Family:
Marriage:
                Children:
- Mary PETRE  Birth: 1
- William PETRE, Lord Petre  Birth: Abt 1626
Death: 5 Jan 1683/4 in Tower of London
- John PETRE, Lord Petre  
- Thomas PETRE, Lord Petre  Death: 5 Jan 1706/7
Bibliography
- 
Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 10, Oakham-Richmond. London: St Catherine Press, 1945. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Information from this source tagged as [Ref: CP X [Ap][p0-9].*].
- 
Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 12-1, Skelmersdale-Towton. London: St Catherine Press, 1953. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Information from this source tagged as [Ref: CP XII/1 [Ap][p0-9].*].
- 
Howard, J Jacoson, Sir Henry Lawson, Genealogical Collections Illustrating the History of Roman Catholic Families of England. Based on the Lawson Manuscript. London: private printing, 1887-92. Available at https://familysearch.org/search/film/007955230, images 1059-1117, images 1122-1153, film/007562061, images 1-1206, film/007955230, images 1158-1180. Information from this source tagged as [Ref: Howard RomCathEng p[0-9]*].
- date: 
- [Ref: CP X p507, Howard RomCathEng p40],
- place: 
- [Ref: CP X p507, Howard RomCathEng p40],
- parents: 
- [Ref: CP X p507, Howard RomCathEng p40]
Sources for death Information
- date: 
- [Ref: CP X p507]
-       28 Oct 1638 [Ref: Howard RomCathEng p40],
- place: 
- [Ref: CP X p507, Howard RomCathEng p40]
Sources for burial Information
- place: 
- [Ref: CP X p507, Howard RomCathEng p40]
Sources with Information about marriage to Mary BROWNE
- date: 
- [Ref: CP X p507, Howard RomCathEng p40],
- child: 
- [Ref: CP X p507, CP X p508, CP X p509, CP XII/1 p311, Howard RomCathEng
p40]
Research Notes:
3rd Lord Petre, of Barony cr 1603 [Ref: CP X p507]
3rd Lord Petre of Writtle [Ref: Howard RomCathEng p40]
heir of his father [Ref: CP X p507, Howard RomCathEng p40]
  
Pedigree of Robert PETRE, Lord Petre
                            /-----
John PETRE
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Sir William PETRE
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John COLLINGE
                  |         \-----
Alys COLLINGE
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John PETRE, Lord Petre
         |        |         /-----
William BROWNE
         |         \-----
Anne BROWNE
 /-----
William PETRE, Lord Petre
|        |         /-----
Sir Edward WALDEGRAVE
|         \-----
Mary WALDEGRAVE
|                 |         /-----
Sir Edward NEVILL
|                  \-----
Frances NEVILL
Robert PETRE, Lord Petre
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John De BEAUFORT, K.G., Marquess of Somerset
|                                                      /-----
Edmund BEAUFORT, K.G., Duke of Somerset
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Margaret HOLAND
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Henry BEAUFORT, Duke Of Somerset
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Sir Richard BEAUCHAMP, K.G., Earl Of Warwick
|                                            |         \-----
Eleanor BEAUCHAMP
|                                            |                  \-----
Elizabeth BERKELEY, Countess Of Warwick
|                                    /-----
Charles SOMERSET, K.G., Earl of Worcester
|                                   |         \-----
Joan HILL
|                           /-----
Henry SOMERSET, Earl Of Worcester
|                          |        |                           /-----
Sir William AP THOMAS
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William HERBERT, K.G., Earl Of Pembroke
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Gladys Ferch DAFYDD
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William HERBERT, Earl Of Pembroke
|                          |        |        |        |         /-----
Sir Walter DEVEREUX
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Anne DEVEREUX
|                          |        |        |                  \-----
Elizabeth MERBURY
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Elizabeth HERBERT, Baroness Herbert
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Richard De WYDEVILLE
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Sir Richard WYDVILLE, K.G., Earl of Rivers
|                          |                 |        |         \-----
Joan BEDLISGATE
|                          |                  \-----
Mary WYDEVILLE
|                          |                          |         /-----
Peter Of Luxemburg, Count Of St. Pol
|                          |                           \-----
Jacquetta Of St.Pol
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Margaret Of Andria
|                  /-----
Sir William SOMERSET, K.G., Earl of Worcester
|                 |        |                           /-----
Sir Richard BROWNE
|                 |        |                  /-----
Sir Thomas BROWNE
|                 |        |         /-----
Sir Anthony BROWNE
|                 |        |        |        |                  /-----
Sir John FITZ ALAN, Lord Arundel
|                 |        |        |        |         /-----
Sir Thomas ARUNDEL
|                 |        |        |        |        |         \-----
Elizabeth DESPENSER
|                 |        |        |         \-----
Eleanor ARUNDEL
|                 |        |        |                 |         /-----
Henry MOYNS
|                 |        |        |                  \-----
Joan MOYNS
|                 |         \-----
Elizabeth BROWNE
|                 |                 |                           /-----
Sir Ralph De NEVILLE, K.G., Earl Of Westmoreland
|                 |                 |                  /-----
Sir Richard De NEVILLE, K.G., Earl Of Salisbury
|                 |                 |                 |         \-----
Joan De BEAUFORT
|                 |                 |         /-----
John De NEVILLE, K.G., Marquess of Montagu
|                 |                 |        |        |         /-----
Sir Thomas MONTAGU, K.G., Earl Of Salisbury
|                 |                 |        |         \-----
Alice MONTAGU, Countess Of Salisbury
|                 |                 |        |                  \-----
Eleanor De HOLAND
|                 |                  \-----
Lucy NEVILLE
|                 |                          |                  /-----
Thomas INGOLDTHORPE
|                 |                          |         /-----
Sir Edmund INGOLDTHORPE
|                 |                          |        |         \-----
Margaret De La POLE
|                 |                           \-----
Isabel INGOLDTHORPE
|                 |                                   |         /-----
Sir John TIPTOFT, Lord Tiptoft
|                 |                                    \-----
Joan TIPTOFT
|                 |                                             \-----
Joyce CHERLETON
|         /-----
Edward SOMERSET, K.G., Earl of Worcester
|        |        |                  /-----
Roger NORTH
|        |        |         /-----
Edward NORTH, Lord North
|        |        |        |        |         /-----
Richard WARCUP
|        |        |        |         \-----
Christian WARCUP
|        |         \-----
Christian NORTH
|        |                 |         /-----
Oliver SQUIRE
|        |                  \-----
Alice SQUIRE
 \-----
Katherine SOMERSET
         |                                                      /-----
Sir Ralph De HASTINGS
         |                                             /-----
Sir Leonard HASTINGS
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Matilda De GREY
         |                                    /-----
Sir William HASTINGS, K.G., Lord Hastings
         |                                   |        |         /-----
Thomas CAMOYS, K.G., Lord Camoys
         |                                   |         \-----
Alice CAMOYS
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Elizabeth LOUCHES
         |                           /-----
Edward HASTINGS, Lord Hastings Of Hungerford
         |                          |        |                  /-----
Sir Ralph De NEVILLE, K.G., Earl Of Westmoreland
         |                          |        |         /-----
Sir Richard De NEVILLE, K.G., Earl Of Salisbury
         |                          |        |        |         \-----
Joan De BEAUFORT
         |                          |         \-----
Katherine NEVILLE
         |                          |                 |         /-----
Sir Thomas MONTAGU, K.G., Earl Of Salisbury
         |                          |                  \-----
Alice MONTAGU, Countess Of Salisbury
         |                          |                           \-----
Eleanor De HOLAND
         |                  /-----
George HASTINGS, Earl Of Huntingdon
         |                 |        |                           /-----
Sir Robert HUNGERFORD, Lord Hungerford
         |                 |        |                  /-----
Sir Robert HUNGERFORD, Lord Hungerford
         |                 |        |                 |         \-----
Margaret BOTREAUX, Baroness Botreaux
         |                 |        |         /-----
Sir Thomas HUNGERFORD
         |                 |        |        |        |         /-----
William De MOLEYNS
         |                 |        |        |         \-----
Eleanor De MOLEYNS
         |                 |        |        |                  \-----
Anne WALESBOROUGH
         |                 |         \-----
Mary HUNGERFORD, Baroness Botreaux
         |                 |                 |                  /-----
Sir Henry "Harry Hotspur" PERCY, K.G.
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Sir Henry PERCY, Earl Of Northumberland
         |                 |                 |        |         \-----
Elizbeth MORTIMER
         |                 |                  \-----
Anne PERCY
         |                 |                          |         /-----
Sir Ralph De NEVILLE, K.G., Earl Of Westmoreland
         |                 |                           \-----
Eleanor NEVILLE
         |                 |                                    \-----
Joan De BEAUFORT
         |         /-----
Sir Francis HASTINGS, K.G., Earl Of Huntingdon
         |        |        |                                    /-----
Edmund STAFFORD, K.G., Earl of Stafford
         |        |        |                           /-----
Humphrey STAFFORD, K.G., Duke Of Buckingham
         |        |        |                          |         \-----
Anne Countess Of Buckingham
         |        |        |                  /-----
Hunphrey STAFFORD, Earl Of Stafford
         |        |        |                 |        |         /-----
Sir Ralph De NEVILLE, K.G., Earl Of Westmoreland
         |        |        |                 |         \-----
Anne NEVILLE
         |        |        |                 |                  \-----
Joan De BEAUFORT
         |        |        |         /-----
Henry STAFFORD, K.G., Duke Of Buckingham
         |        |        |        |        |                  /-----
John De BEAUFORT, K.G., Marquess of Somerset
         |        |        |        |        |         /-----
Edmund BEAUFORT, K.G., Duke of Somerset
         |        |        |        |        |        |         \-----
Margaret HOLAND
         |        |        |        |         \-----
Margaret BEAUFORT
         |        |        |        |                 |         /-----
Sir Richard BEAUCHAMP, K.G., Earl Of Warwick
         |        |        |        |                  \-----
Eleanor BEAUCHAMP
         |        |        |        |                           \-----
Elizabeth BERKELEY, Countess Of Warwick
         |        |         \-----
Anne STAFFORD
         |        |                 |                           /-----
Sir John De WYDEVILLE
         |        |                 |                  /-----
Richard De WYDEVILLE
         |        |                 |                 |         \-----
Isabel GOBION
         |        |                 |         /-----
Sir Richard WYDVILLE, K.G., Earl of Rivers
         |        |                 |        |        |         /-----
Thomas BEDLISGATE
         |        |                 |        |         \-----
Joan BEDLISGATE
         |        |                 |        |                  \-----
Joan BEAUCHAMP
         |        |                  \-----
Katherine WYDEVILLE
         |        |                          |                  /-----
Jean II Count Of Brienne And Conversano
         |        |                          |         /-----
Peter Of Luxemburg, Count Of St. Pol
         |        |                          |        |         \-----
Marguerite De Enghien
         |        |                           \-----
Jacquetta Of St.Pol
         |        |                                   |         /-----
Francis De Baux, Duke Of Andria
         |        |                                    \-----
Margaret Of Andria
         |        |                                             \-----
Sveva ORSINI
          \-----
Elizabeth HASTINGS
                  |                           /-----
Geoffrey POLE
                  |                  /-----
Sir Richard POLE, K.G.
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Sir John De St JOHN
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Sir Oliver St JOHN
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Isabel De PAVELEY
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Edith St JOHN
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Sir John De BEAUCHAMP, Baron Beauchamp Of Bletsoe
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Margaret De BEAUCHAMP
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Edith STOURTON
                  |         /-----
Sir Henry POLE, Lord Montagu
                  |        |        |                           /-----
Richard Of York Earl Of Cambridge
                  |        |        |                  /-----
Richard PLANTAGENET, K.G., Duke of York
                  |        |        |                 |         \-----
Anne De MORTIMER
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Sir George PLANTAGENET, K.G., Duke Of Clarence
                  |        |        |        |        |         /-----
Sir Ralph De NEVILLE, K.G., Earl Of Westmoreland
                  |        |        |        |         \-----
Cecily NEVILLE
                  |        |        |        |                  \-----
Joan De BEAUFORT
                  |        |         \-----
Margaret PLANTAGENET, Countess Of Salisbury
                  |        |                 |                  /-----
Sir Richard De NEVILLE, K.G., Earl Of Salisbury
                  |        |                 |         /-----
Richard King-Maker NEVILLE, K.G., Earl Of Warwick
                  |        |                 |        |         \-----
Alice MONTAGU, Countess Of Salisbury
                  |        |                  \-----
Isabel NEVILLE
                  |        |                          |         /-----
Sir Richard BEAUCHAMP, K.G., Earl Of Warwick
                  |        |                           \-----
Anne BEAUCHAMP
                  |        |                                    \-----
Isabel Le DESPENSER, Baroness Burghersh
                   \-----
Catherine POLE
                           |                                    /-----
Sir Ralph De NEVILLE, K.G., Earl Of Westmoreland
                           |                           /-----
Edward NEVILLE, Lord Abergavenny
                           |                          |         \-----
Joan De BEAUFORT
                           |                  /-----
Sir George NEVILLE, Lord Abergavenny
                           |                 |        |         /-----
Richard BEAUCHAMP, Earl Of Worcester
                           |                 |         \-----
Elizabeth BEAUCHAMP, Baroness Abergavenny
                           |                 |                  \-----
Isabel Le DESPENSER, Baroness Burghersh
                           |         /-----
George NEVILLE, K.G., Lord Abergavenny
                           |        |        |         /-----
Hugh FENNE
                           |        |         \-----
Margaret FENNE
                            \-----
Jane NEVILLE
                                    |                           /-----
John ARUNDEL, Earl of Arundel
                                    |                  /-----
William ARUNDEL, K.G., Earl of Arundel
                                    |                 |         \-----
Eleanor De BERKELEY
                                    |         /-----
Thomas ARUNDEL, K.G., Earl of Arundel
                                    |        |        |         /-----
Sir Richard De NEVILLE, K.G., Earl Of Salisbury
                                    |        |         \-----
Joan NEVILL
                                    |        |                  \-----
Alice MONTAGU, Countess Of Salisbury
                                     \-----
Joan FITZ ALAN
                                             |                  /-----
Richard De WYDEVILLE
                                             |         /-----
Sir Richard WYDVILLE, K.G., Earl of Rivers
                                             |        |         \-----
Joan BEDLISGATE
                                              \-----
Margaret WYDEVILLE
                                                      |         /-----
Peter Of Luxemburg, Count Of St. Pol
                                                       \-----
Jacquetta Of St.Pol
                                                                \-----
Margaret Of Andria
  Descendants of Robert PETRE, Lord Petre
2nd generation 
3rd generation 
4th generation 
5th generation