Hello
If you look for George juniors siblings you find
Ann 14.11.1756 Ovingham
Anthony 9.9.1759 Chester le St
then George 22.3.1761
So how about George s of Anthony at Lanchester 7.4.1734.
Marriage at Long Newton 30.11.1755 George Snowball to Mary Robson.
Anthony's other children Anthony 26 Sep 1736 and Robert 22.2.1741
It looks like Anthony may have married a Margaret White at Ovingham 20.5.1725
son Thomas bapt 4.9.1726 Bywell st Peter.
I don't know the area so wouldn't like to go further.
Ciderdrinker