Not the father of John de Lancaster, I of Raynhill - I think Roger De Lancaster, II of Rainhill is the correct father.
Is this the same lineage as [https://en.wikipedia.org/wiki/William_de_Lancaster_I#Enfeoffment_fr...] or is this yet another William deLancaster? need to review John de Lancaster as his father?
How did we come up with this?
Quite a bit of research has been done over the years with documentation-
[https://www.british-history.ac.uk/vch/lancs/vol3/pp368-371#fnn17] British History Online