Genealogy of the Marshall Family,
including Medieval and Ancient Lines

Updated: 01-20-2025.

Submitted and Maintained by Bill Marshall, bill.marshall@verizon.net.


Additions and corrections appreciated (especially with sources). My current list of sources is here. Homepage here.

Index of Medieval and Ancient Lines is here, notable people here, and Gedcom available to be downloaded.

Index of Modern Lines (immigrants to America and their descendants) is here, notable people here, and Gedcom here.


Individual Page


Family:
Marriage: Children:
  1. Murchad Mac Brian Death: 23 Apr 1014 in Clontarf
  2. Conchobar Mac Brian
  3. Flann Mac Brian

Marriage: Children:
  1. Slani
  2. Tadg Mac Briain Death: 1023
  3. Be Bind Death: 1073
  4. Dub Essa Death: 1052

Marriage: Children:
  1. Donnchad King Of Munster Death: 1064

Marriage:
Bibliography
  1. Byrne, Francis John, Irish Kings and High Kings, London: B.T. Batsford, Ltd, 1973. Information from this source tagged as [Ref: Byrne IrishKings p[0-9]*].
  2. The Henry Project: The Ancestors of King Henry II of England, An eperiment in a cooperative online database for scholarly medieval genealogy. Contributors and Editors: Stewart Baldwin, Todd Farmerie, Peter Stewart. Available at https://fasg.org/projects/henryproject/ Information from this source tagged as [Ref: HenryII .*].
  3. Kelley, David H., The Ancestry of Eve of Leinster, in The Genealogist, vol 1 no 1, Spring 1980, pp4-27. NYPL APA 82-1000. Available at https://www.americanancestors.org/databases/genealogist-the/image/. Information from this source tagged as [Ref: Kelley Eve p[0-9]*].
  4. Kelley, David H., A Descent from the Kings of Strathclyde, The American Genealogist, vol 47 (Apr 1971) pp79-86. Available at http://americanancestors.org/databases/american-genealogist-the/image/. Information from this source tagged as [Ref: Kelley Strathclyde p[0-9]*].
  5. Moncreiffe, Sir Ian of that Ilk, Royal Highness: Ancestors of the Royal Child. London: Hamish Hamilton, 1982. NYPL ARF 83-3293. Information from this source tagged as [Ref: Moncreiffe RoyalAnc p[0-9]*].
  6. Baldwin, Stewart, Ancestry of Brian Boru. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 1/7/1996. Subject: Brian Boru. Available at https://groups.google.com/g/soc.genealogy.medieval/c/DY6JvxIkgCI/m/ZmHmbEAyEw0J. Author address: baldwsl at MAIL dot AUBURN dot EDU. Information from this source tagged as [Ref: Stewart Baldwin SGM 1/7/1996].
  7. Baldwin, Stewart, More on Brian Boruma's family. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 10/16/1998. Subject: More on Brian Boruma's family. Available at https://groups.google.com/g/soc.genealogy.medieval/c/nykJZVyTxqA/m/YWoHU4lrmbsJ. Author address: sbald at auburn dot campus dot mci dot net. Information from this source tagged as [Ref: Stewart Baldwin SGM 10/16/1998].
  8. Baldwin, Stewart, Llywelyn ap Iorwerth ancestor table. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 7/27/1997. Subject: Llywelyn ap Iorwerth ancestor table, gen. 1-8, 9-13, 14-18. Available at https://groups.google.com/g/soc.genealogy.medieval/c/62kLGKCIBno/m/ueu-1XrMKmAJ, https://groups.google.com/g/soc.genealogy.medieval/c/AhLsHr4k35Q/m/-09JXMxH0fEJ, and https://groups.google.com/g/soc.genealogy.medieval/c/2tnpOmyP9LU/m/o_nX5ZiILHYJ. Author address: sbald at AUBURN dot CAMPUS dot MCI dot NET. Information from this source tagged as [Ref: Stewart Baldwin SGM 7/27/1997].
  9. Baldwin, Stewart, Eve of Leinster and Radnailt of Dublin. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 7/28/1996. Subject: Eve of Leinster and Radnailt of Dublin. Available at https://groups.google.com/g/soc.genealogy.medieval/c/ynfbqPH1lCw/m/ySwkNypyO4kJ. Author address: sbald at AUBURN dot CAMPUS dot MCI dot NET. Information from this source tagged as [Ref: Stewart Baldwin SGM 7/28/1996].
  10. Baldwin, Stewart, Donnell O'Brien, king of Thomond. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 8/29/2001. Subject: Donnell O'Brien, king of Thomond. Available at https://groups.google.com/g/soc.genealogy.medieval/c/6QNgVklU1bw/m/KEwml0_WATkJ. Author address: sbaldw at mindspring dot com. Information from this source tagged as [Ref: Stewart Baldwin SGM 8/29/2001-030404].
  11. Tapsell, R. F., Monarchs, Rulers, Dynasties and Kingdoms of the World. New York: Facts on File Publications, 1983. Information from this source tagged as [Ref: Tapsell Dynasties p[0-9]*].
  12. Weis, Frederick Lewis, Walter Lee Sheppard, Jr, David Faris, Ancestral Roots of Certain American Colonists who came to America before 1700, 7th Edition, Baltimore: Genealogical Publishing Co, 1992. Information from this source tagged as [Ref: Weis AR7 #[0-9][0-9]*[A-Z]*].

Sources for birth and parent Information
date:
[Ref: Kelley Eve p22]
possibly 941 [Ref: HenryII brian000 9/9/2001],
parents:
[Ref: HenryII brian000 9/9/2001, Kelley Eve p22, Stewart Baldwin SGM 7/28/1996],
father:
[Ref: Byrne IrishKings p297]
Sources for death Information
date:
[Ref: HenryII brian000 9/9/2001, Stewart Baldwin SGM 7/27/1997, Stewart Baldwin SGM 7/28/1996]
1014 [Ref: Kelley Eve p22, Moncreiffe RoyalAnc p16, Tapsell Dynasties p185, Weis AR7 #175],
place:
[Ref: HenryII brian000 9/9/2001, Moncreiffe RoyalAnc p16, Weis AR7 #175]
Sources for burial Information
place:
[Ref: HenryII brian000 9/9/2001]
Sources with Information about marriage to Mor
date:
first marriage of Brian [Ref: HenryII brian000 9/9/2001],
child:
[Ref: HenryII brian000 9/9/2001]
Sources with Information about marriage to Echrad
date:
second marriage of Brian [Ref: HenryII brian000 9/9/2001],
child:
[Ref: HenryII brian000 9/9/2001, Kelley Eve p13, Moncreiffe RoyalAnc p16, Stewart Baldwin SGM 10/16/1998, Stewart Baldwin SGM 7/27/1997, Stewart Baldwin SGM 7/28/1996, Stewart Baldwin SGM 8/29/2001-030404, Tapsell Dynasties p185, Weis AR7 #239]
Sources with Information about marriage to Gormflaith Of Nass
date:
m(3)1000 of Gormflaith [Ref: Kelley Eve p13]
third marriage of Brian [Ref: HenryII brian000 9/9/2001],
child:
[Ref: HenryII brian000 9/9/2001, Kelley Eve p13, Kelley Strathclyde p86, Stewart Baldwin SGM 7/28/1996, Weis AR7 #175, Weis AR7 #239]
Sources with Information about marriage to Dub Choblaig
date:
fourth marriage of Brian [Ref: HenryII brian000 9/9/2001],
names:
[Ref: Stewart Baldwin SGM 10/16/1998]
Research Notes:
King of the Dalcassians [Ref: Weis AR7 #175]
King of Munster [Ref: Tapsell Dynasties p185, Weis AR7 #175]
King of Cashel [Ref: Tapsell Dynasties p185]
King of Ireland [Ref: Stewart Baldwin SGM 7/27/1997, Stewart Baldwin SGM 7/28/1996, Weis AR7 #175]

976-1002 King of Munster [Ref: Weis AR7 #175]

978-1014: King of Mumu (Munster) [Ref: HenryII brian000 9/9/2001]

978: became King of Munster upon defeating and killing the previous king Mael Maud mac Brian (of Eoganacht Raithlind) [Ref: HenryII brian000 9/9/2001]

rose from the king of the Dalcassians to he king of Munster and finally usurped the high kingship of Ireland [Ref: Kelley Eve p22]

possibly daughter Sadb, who married Cian of Desmond (appears in introduction to Coqadh Gaedhel re Gallaibh, but not in text) [Ref: Stewart Baldwin SGM 10/16/1998]

1002-1014: King of Ireland [Ref: HenryII brian000 9/9/2001]

1002: recogniezed as king of Ireland on the submission of Mael Sechnnaill mac Domnaill [Ref: HenryII brian000 9/9/2001]

-1014: King of Cashel and Munster [Ref: Tapsell Dynasties p185]

23 Apr 1014: his forces were victorious at the famous Battle of Clontarf near Dublin on Good Friday, 23 Apr 1014, but both Brian and his son Murchad were killed there [Ref: HenryII brian000 9/9/2001]

it has been proven that the earlier generations in his genealogy were a deliberate falsification, done to hide the fact that Brian was descended from one of the minor septs of Ireland, rather than from the illustrious Eoganachta (whose genealogy seems to have been itself falsified at an earlier date). [Ref: Stewart Baldwin SGM 1/7/1996]

Brian was descended from the minor sept called the Deisi, and in fact came from a branch of the Deisi called "In Deis Becc", which could be translated "little Deisi". "In Deis Becc" was divided into two sections, "In Deis Deiscirt", and "In Deis Tuascairt", of which Brian belonged to a branch of the latter called "Ui Toirdelbaig", named after Toirdelbach, an ancestor who lived in the eighth century. The first member of Ui Toirdelbaig to become even a minor king was Lorcan, Brian's grandfather, but the family's fortunes rose swiftly after that to become one of the most poweful in Ireland. [Ref: Stewart Baldwin SGM 1/7/1996]

1002: usurped the high kingship of Ireland, 1002-1014 [Ref: Weis AR7 #175]

killed at the battle of Clontarf, 1014, fighting a mixed force of Norse and Leinstermen. [Ref: Weis AR7 #175]

at least three wives [Ref: Weis AR7 #175]



Pedigree of Brian Boruma, King Of Cashel And Munster, High
                                                                /-----Caidlene
                                                       /-----Tairdelbach
                                              /-----Mathgamain
                                     /-----Anluan
                            /-----Corcc Mac Anluain
                   /-----Lachtnae Mac Cuircc
          /-----Lorcan Dal Cais King Of Munster And Thomond
 /-----Cennetig Dal Cais King Of Munster And Thomond
Brian Boruma, King Of Cashel And Munster, High
|                                                               /-----Amalgaid
|                                                      /-----Flann Rodba
|                                             /-----Fiangalach
|                                    /-----Flaithnia
|                           /-----Moenach Mac Flaithnia
|                  /-----Murchad King Of West Connacht
|         /-----Aurchad King Of Ui Briuin Or West Connacht
 \-----Be Bind
         |                  /-----Anguile
         |         /-----Crechan
          \-----Osnadh
                  |         /-----Ciocharan
                   \-----Cianog



Descendants of Brian Boruma, King Of Cashel And Munster, High
1. Brian Boruma, King Of Cashel And Munster, High m1. Mor m2. Echrad m3. Gormflaith Of Nass m4. Dub Choblaig
m. Mor father: Eiden Mac Clerig
m. Echrad father: Carrlus Mac AILELLA, King Of Ui Adea Ocba
m. Gormflaith Of Nass father: Murchad Ui DUNLAINGE, King Of Laigin & Leinster mother: (Unk Princess) Of Connacht
m. Dub Choblaig father: (Unk) King Of Connacht

2nd generation

5. Slani m. Sihtric III Of The Silken Beard OLAFSON, King Of Dublin
m. Sihtric III Of The Silken Beard OLAFSON, King Of Dublin father: Olaf III Sihtricsson, King Of Yorks And Dublin mother: Gormflaith Of Nass
6. Tadg Mac Briain m. Mor
m. Mor father: Gilla Brigte Ua Mael Muaid, King Of Cenel Fiachach
9. Donnchad King Of Munster m1. m2. Druella
m. Druella father: Godwin Ealdorman Of Wessex mother: Githa

3rd generation

10. Olaf Of Dublin m. Maelcorcre Of Leinster
m. Maelcorcre Of Leinster father: Dunlang Ui DUNLAINGE, King Of Laigin & Leinster
11. Tairrdelbach Mac TADG, King Of Cashel And Munster, Hi m. Derbforgaill
m. Derbforgaill father: Tadc Mac Gilla Patraic
12. Darbforgaill m. Diarmait MacMAEL Nam BO, King Of Hy Kinsale
m. Diarmait MacMAEL Nam BO, King Of Hy Kinsale father: Donnchad Mael Na MBo Ui Cheinnselaig King Of Laigin & Leinste mother: Aife

4th generation

14. Ragnaillt Of Dublin m. Cynan Ap Iago, Prince Of North Wales
m. Cynan Ap Iago, Prince Of North Wales father: Iago Ab Idwal, Prince Of Gwynedd
16. Muirchertach Ua BRIAIN, High King Of Ireland m.
17. Diarmaid O'Brien, King Of Munster m. Mor
m. Mor father: Ruaidri Na Saide Buide Ua Conchobar, King of Co
18. Murchad Mac DAIRMAIT, King Of Laigin And Leinste m. Sadb
m. Sadb father: Muirchertach MacBRICC, King Of Dessi

5th generation

20. Gruffydd Ap Cynan, Prince Of Gwynedd m. Angharat Of Tegaingl
m. Angharat Of Tegaingl father: Owain Ap Edwin mother: Morwyl Ferch Ednywain Bendew
21. Lafrocoth m. Arnulph De MONTGOMERY
m. Arnulph De MONTGOMERY father: Roger De Montgomery, Earl Of Shrewsbury mother: Mabel De Belesme
22. Tairrdelbach O'Brien, King Of Munster m. Sadb
m. Sadb father: Donnchad Balc Mac Gilla Patraic Ruad, King of Ossraig
24. Donnchad Mac MURCHAD, King Of Dublin, Laigin, Lei m. Orlaith
m. Orlaith father: Gilla Michil Ua Braenain mother: Iuchdelb