I assume you have the Holmes family in 1851. In 1841 there is an entry, as GeoffE says, for John age 35 shoemaker, John 15 Cooper Ap, James 9, Alice 35, Margaret 12. They are living at Forth Bank, St Nicholas, Northumberland. Remember ages above 15 were usually rounded down to the nearest 5 in 1841.
HO107/848/12 F38 P9 However, all say born in County whereas Margaret does say Whitehaven in 1851.
Andrea