His sister Angharad married William de Barri and was the mother of Gerald of Wales .
FitzGerald was the son of Gerald of Windsor and Nest , daughter of Rhys ap Tewdwr , and was probably born between 1103 and 1109 .
FitzGerald 's sister Angharad married William de Barri and was the mother of Gerald of Wales .
FitzGerald was the son of Gerald of Windsor and Nest , daughter of Rhys ap Tewdwr , and was probably born between 1103 and 1109 .