[1][better source needed] He married a daughter of the Archbishop of Dol, and had a younger brother, Baderon, and a son, Ratier (or Raterius), who both became monks.
[2] Following the Norman Conquest of England in 1066, William fitzOsbern was appointed Earl of Hereford, and established the first castle at Monmouth, overlooking the rivers Wye and Monnow at the southernmost tip of the area then known as Archenfield in the Welsh Marches.
This arrangement continued until the fourteenth century, with the priors of Monmouth coming from Saumur, and part of its revenue, as an alien priory, being sent back to France.
[2] The founding charter of the priory has been transliterated as follows: "Wihenoc de Monmouth, to all men, his friends and neighbours, to all the faithful sons of the holy mother church, as well present as future, wishes health.
Witness my brother Baderon, &c."[4]After about seven years at Monmouth, Withenoc gave up his secular responsibilities in 1082 and retired, as a monk, to the abbey at Saumur.