No Rolfe's in Hockliffe in 1851. Only one in Leighton Buzzard according to the surname list.....that being an Elizabeth Rolfe aged 65.
1851 Totternhoe.
Joseph Rolfe, Head, M, 50, A/Lab, Bds, Hockliffe
Charlotte Rolfe, Wife, M, 50, S/P, Bks, Edlesborough
Richard Rolfe, Son, 19, S/P, Bds, Totternhoe,
William Rolfe, Son, 16, S/P, Bds, Totternhoe,
Mary Ann Rolfe, dau, 13, S/P, Bds, Totternhoe,
Ann Reeve, lod, U, 16, S/P, Bds, Totternhoe,
James Rolfe, Head, M, 21, S/P, Bds, Totternhoe,
Ann Rolfe, Wife, M, 21, S/P, Bds, Totternhoe,
William, son, 9 mths, Bds, Totternhoe
Hope this helps, Waterfall