Any further information is gratefully accepted towards the combined pool of Mossop knowledge.
The first mention of these families appears to be in Gosforth area of West Cumberland.
In December 1619, William of Rackes died and his administrator was his widow Margaret.
In December 1622, Margaret, widow of Ponsonby died (presumed widow of William of Rackes). It therefore appears that William of Rackes and his wife Margaret had no children, which the above mentioned chart showed them as having and this is why I think the parentage should be reversed.
It appears that this son, William, lived in maturity at a place/farm called "Rackes" in Gosforth and is henceforth known as "William of Rackes".
I have looked in every imaginable place for a will of William of Bankhouse without success.
The above is piecing together information which is not proven but the first time we definitely identify our family is in 1638 when Margaret Moscrop, widow, died at High Prior Scale and was buried in the parish of St. Her administrators were her two sons, William and Barnerd.
The initial research came to me through George Kendall Gillberry who had collected papers passed down through Ruth Geldart (a founder member of Cumbria F. S.), Arthur Brewin (grandson of Clement and Martha Mossop (neé Coulthard ) of Rottington, Dr. This input would not have been possible without the contributions of Marshall & Jean Mossop, George Kendall Gillberry, the late Grant Dixon, Maggie Blyth and all the other persons who have added their own family line.
Mossop who was descended from the Seascale/Lincolnshire branch.
From my own research I believe the above to be the more likely scenario for reasons below.