Thanks for that clarification Peter. The grey area that I was trying to clarify is the point that Jean de Bretagne supposedly owned the property late 12 early 1300's and the point where our de Wenbourne clan took over when Gilbert de Waneburn pops up on the tax list 1295. As I see it that would be the crucial moment when our family name was born as prior to Gilbert gaining ownership theoretically there were no de Wanebournes. (of our line anyway at least)
I realise the buildings themselves are not substantial, I was referring to the original land holding of around 100 acres and the fact that someone connected with the royals of the time actually owned the property.