If the 2nd 'Christian' name wasnt Christian (or some other Manx family name) then it generally indicates some English connection in the family as the English had adopted 2 given names before then. H is not a common initial for given names (eg Harry/Henry were English) - only a couple of Manx family names start with H (Hudgeon Hutchin .. Harrison is a possibility as this name was established in Mann see Moore's comments in http://www.ee.surrey.ac.uk/Contrib/manx/manxnb/v12p151.htm)