As often in this era, there doesn't seem to be enough data for a positive reconstruction of the Vavasours. Other points at issue are the parentage of William the judge, and the divergence of the Denton branch.
There are various attempts, going back to Glover, but no two the same.
The only possibility is to pick one version and go with it. But on a user-contrib wiki, that's virtually impossible, because people won't go along with what's been done, they'll keep intruding information from an incompatible alternative theory.