I'm rather puzzled by this one. Dean isn't a common name and there's only one Dean Swift in Swaton in 1851 but the rest of the family don't quite match up.
1841 - HO107, piece 202, folio 312, p 14.
Swaton, Lincs.
Mary Swift, Head, W, 56, b. Sewstern?
Dean Swift, Son, S, 30, Ag lab, b. Sewstern.
William Swift, Son, S, 28, Carpenter, b. Sewstern.
Edward Swift, Son, S, 24, Ag lab, b. Swaton.
George Swift, Son, S, 21, Ag lab, b. Swaton.
Are they yours?
Monica