On 16/05/2016 2:38 AM, taf via wrote: > On Sunday, May 15, 2016 at 6:50:17 AM UTC-7, joe...@gmail.com wrote: >> These references above merely show that Petronille's father was named >> William, but that her grandfather is uncertain, although there is some >> conjecture that Robert, son of Hugh, might be a good candidate. > The question was summarized here in detail some years ago by Chris Phillips: > > https://groups.google.com/forum/#!topic/soc.genealogy.medieval/2LxfjMCvo5Y > I don't know if this has come up before: Petronilla's mother may have been the Agatha whose husband William de Grandmesnil died on a 3 October (year unknown) according to the obituary of Saint-Denis, see https://archive.org/stream/recueildeshistor01acaduoft#page/326/mode/2up. Peter Stewart