354722828. Gilbert de Clare Earl of Pembroke
1http://homepages.rpi.edu/~holmes/Hobbies/Genealogy2/ps03/ps03_463.htm.
354722829. Isabel de Beaumont
1http://homepages.rpi.edu/~holmes/Hobbies/Genealogy2/ps03/ps03_463.htm.
354729977. Ida de Toeni
1The New England Historical and Genealogical Register, Vol. 160, page 105.