Notes for Geoffrey (I) de Dinan Seigneur de Dinan
From Dinan, Cotes-d'Amor, Brittany.
Tenant-in-chief at Hartland, Devon, given by Henry (I, presumably).
He also had a son Oliver (though Keats-Rohan has some confusing dates for the respective parents of the sons). Oliver m. Agnoria, dau. of count Stephen of Brittany, lord of Richmond. Oliver d. in 1130 with 3 s.: Geoffrey, Oliver and William.
Geoffrey’s yst s. was Josce who d. 1166 with 2 daus: Sibil (d. 1212), who m. Hugh de Plugenet, and Hawise, who m. Fulk FitzWarin (d. 1197).