According to trees online, George was the son of John Wilkinson, b 1837 in Billinghay, Lincolnshire (died 1893 in Aukland, Durahm),
and Mary Robinson, b 1843 in Gateshead.
John's parents were Bailey (1810-1891) and Margaret Cowling (1811-1876).
If correct, Margaret's ancestry goes back to 1570 in Lincolnshire.
David
P.S. Other trees have him born 1858 in Egglescliffe, Durham, to John Wilkinson (1818-1877)and Mary Ann Morely (1821-1899)
The 1921 Census has George born in Billingham Parish.