Thanks, Geoff - but where was William in 1841 and 1851

In 1851, he was with parents (as stated earlier) ... and Mary -
Swaby
Johnson PATCHETT 59 AgLab and Grocier*, Swaby
Sarah 49 Grociers* wife, Thoresby
William 9 Schollar, Swaby
Daniel 6 Schollar, Swaby
Ann Maria 5 Home, Swaby
Mary EVISON (Visiter) 25 Lab Wife, Swaby
Philip 2 Home, S Somercotes
It's
possible that this is
Grazier but, clearly, the enumerator was not the greatest of spellers. Also on the page were several "Weelrights".
You may find the following marriage useful
William EVISON (son of John) to Mary Ann PATCHETT (dau of Johnson) 13 June 1848 at Swaby.