in Oxford Dictionary of National Biography
September 2004; p ublished online September 2004 .
Reference Entry. Subjects: Genealogy, Heraldry, Names, and Honours; Local and Family History. 1301 words.
Iestyn ap Gwrgant (fl. c. 1081–c. 1120), nobleman, was an important Welsh magnate, of whom little is known outside two references to him in the Book of Llandaff, datable to...