https://en.wikipedia.org/wiki/Josce_de_Dinan
Wikipedia states his parents as Geoffrey de Dinan and Radegonde Orieldis. Their source is Keats-Rohan Domesday Descendants p. 434. Since his parents are unsourced here, I am adding the Keats-Rohan parentage as a flag for further research. His wife, through whom he acquired Ludlow Castle, is also missing; she is stated as Sybil, the widow of Pain fitzJohn, a member of the de Lacy family.
https://en.wikipedia.org/wiki/Sybil_(wife_of_Pain_fitzJohn)
