Alan de Becherel

https://fr.wikipedia.org/wiki/Alain_de_Dinan

Alain, auteur de la branche de Dinan-Sud,

https://en.wikipedia.org/wiki/Josce_de_Dinan

Josce was the youngest son of Geoffrey de Dinan and Radegonde Orieldis, and had two older brothers, Oliver of Dinan and Alan of Becherel. Josce's family was from Brittany, and he was described by the historian Marjorie Chibnall as an "obscure Breton adventurer". Josce moved from Devon in southern England to the Welsh Marches, the border between England and Wales, because the lords of Monmouth were also of Breton extraction. While in the Marches he joined King Stephen's household.