Ages in censuses were often inaccurate, and to sort out the many Christians you also need to look at parish registers and civil registration certs to confirm you have the right family.

If you look up their details on the parish reg. for their marriage on 17 Nov. 1866 Lonan, either at the Manx Museum library or on LDS film ordered through any Family History Centre, film no. 0106728, it will give you their fathers' names and occupations, and possibly residences.

If they turn out to be the Maughold ones let me know because I may be able to help with earlier records.

Sue