The spelling of Corkill varies in the census:
John Corkil, head, mar., 59, farmer of 6 acres,
Elenor, wife, mar. 60,
John, son, unmar., 24, agricultural labourer,
James, son, unmar, 18, " "
Daniel " " 16, joiner apprentice,
Christian, mother, widowed, 81,
Robert Cleator, servant, 11, boy servant.

This also answers your other question about Christian and John.
Janet.