Erica Howton, yes so, I refered that his father Thomas should has title sir
There we also had a discussion, that this Ian Mortimer also stated that mother of Gwladys Ddu verch Llewelyn, great-grandmother of Roger Mortimer, earl of March was daughter of Llywelyn the great was also a daughter of Joan - Plantagenet, Lady Snowdon, illegitimate daughter of king John I "Lackland", King of England
