Rhys ap Gruffydd
Robert was captured in November 1165 by Rhys ap Gruffydd (The Lord Rhys) who was the nephew of his mother Nest. The King of Leinster appealed to Rhys (in 1167) to release Robert for an expedition to Ireland. Rhys did not oblige at the time, but in response to a further appeal in 1168 released Robert from captivity.