David FitzGerald, Bishop of St. David'S

Wikipedia:

David FitzGerald was the son of Gerald of Windsor and Nest, daughter of Rhys ap Tewdwr,[3] and was probably born between 1103 and 1109.[2] His sister Angharad married William de Barri and was the mother of Gerald of Wales.[3] The eldest brother was William, the Lord of Carew, and a younger brother was Maurice. There were also some half-brothers who held lands in Wales, including Robert Fitz-Stephen, who later secured fitzGerald's help in getting released from captivity.[2]

FitzGerald was a canon of the cathedral chapter of St David's Cathedral and Archdeacon of Cardigan before he was elected to the bishopric of St Davids on 14 December 1148.[4]

[He] had at least one son and several daughters, whom he provided for out of the lands of St David's. His son, Miles, became a member of one of the Norman invasions of Ireland, and was formally acknowledged as the bishop's son.

Please see Darrell Wolcott: Osbwrn Wyddel of Cors Gedol; http://www.ancientwalesstudies.org/id203.html. (Steven Ferry, August 30, 2020.)