Paul, Sir James Balfour, Scots Peerage: founded on Wood's edition of Sir Robert Douglas's peerage of Scotland; containing an historical and genealogical account of the nobility of that Kingdom. Edinburgh: David Douglas, 1904. NYPL ARO (Scots Peerage) (too fragile to copy). Available at https://familysearch.org/search/catalog/216265. Information from this source tagged as [Ref: SP V p[0-9]*].
Sources for birth and parent Information
father:
illeg son [Ref: SP V p342]
Sources with Information about marriage to Elizabeth STEWART
names:
[Ref: SP V p342]
Research Notes:
appears to have been legitimated in some way, as he is styled lawful son
i a writ by his father; however the designation of Isabella as heiress of
the Earldom in 1423 corroborates the view that he was illegitimate [Ref: SP V
p342, SP V p343(2)]