I suspect that John is s/o Wm Quilliam and Ann Quirk bapt Patrick 18150312 - he is not with parents in 1841 whereas most of other children are.
Wife Jane (some 12yrs older than he) is I think d/o Wm Crellin + Ellinor radcliffe - hower I don't seem to have a marriage for John + Jane

Jane had a previous illeg dau Mary by Wm Marwood in 1831 - with the family in 1841 when also at Ballakerka