Gerald fitzWalter (or Gerald of Windsor), the second son of Walter fitzOther, was appointed by Henry I to be Constable of Pembroke Castle and Pres. of Pembroke County. Gerald of Windsor married Nesta, daughter of Rhys ap Tudor Mawr (Prince of South Wales). William and Nesta had four children:
1. William fitzGerald, whom Giraldus Cambrensis expressly calls "Williamus primaevus". William succeeded to Carew Castle, and was ancestor of the family of Carew. William, the father of Raymond le Gros, died in A.D. 1173.
2. Maurice fitzGerald, Lord of Maynooth and Baron of Naas, who died in 1176.
3. David fitzGerald, Bishop of St. David's in A.D. 1147, who died in A.D. 1176.
4. Angharat (a daughter) who married William de Barri, to whom she bore Giraldus Cambrensis, the historian, and Philip de Barri, Lord of Manobier.