Nanny WILD death registered Dec qtr 1870 Halifax vol 9a p370 age 83
There are two possibles on the 1851 census (on FamilySearch):
(1) Nanny WILD in Keighley, 65, bred baker, born Keighley, married to Robert WILD 66 stone mason; with two daughters and one granddaughter.
(2) Nanny WILD in Halifax RD, widow, 63, born Barkisland, housekeeper to William WARD farmer and his family.
The first one is on the 1841 census as Nancy WILD 55 with Robert 56 and family.
The second one is probably on the 1841 census in Halifax St James: Ann WILD, 60, with James WILD, 60, Samuel WILD 30, also Sarah NICOLL 20 and Elizabeth NICOLL 1.
I have not yet found Nanny born Barkisland after 1851 - but Nanny can be an alternative to various first names.
Philip