The nearest census records I can find are for 1851.

Castletown, district 3, schedule 60, School Lane
Philip Stephen, head, widower, 78, tailor, German
Elizabeth Corrin, daughter, widow, 57, Castletown
James Corrin, grandson, 17, pupil teacher, Castletown
Thomas, grandson, 11, scholar, Castletown
Philip, grandson, 9, scholar, Castletown

Lonan, district 3, schedule 92, Reyncell
William Cowin, head, married, 29, lead ore miner, Lonan
Jane, wife, married, 32, Lonan
Jane, daughter, 8, Lonan
Elizabeth, daughter, 7, Lonan
Hannah, daughter, 5, Lonan
Mary A, daughter, 4, Lonan
Agnes, daughter, 2, Lonan
Margaret, daughter, 1, Lonan