1851 census, North Seaton Hall:
William Kennedy, Servant, Unm, 26, Second Coachman, b. Stamfordham.
A few lines further down in the same household :
Sarah Forster, Servant, Unm, 21, Kitchen Maid, b. Newbiggin.
HO107/2418/471/15
There is a Kennedy family in Stamfordham in 1841, headed by a Thomas Kennedy, but no William present.
1841 Stamfordham,
Thomas Kennady, 50, Huntsman, Y,
Mary, 45, Y
Jane, 25, Y
John 20, Mason, Y
Hannah, 11, Y
Isabel, 7, Y
Thomas, 5, Y
George, 3, Y
John, 1m, Y
HO107/842/10/8/11
Alan.