Hi and welcome. A lot of the Manx records are available free to view on FamilySearch. There's a baptism at St Mary's in Castletown on March 22nd for an Edward Callow son of William Callow (Revenue Officer) and Jane Callow (no maiden name recorded). You probably have this already.

www.familysearch.org/ark:/61903/1:1:X8MJ-DXS

You probably have his naturalisation card too that gives his date of birth as March 18th 1828.

www.familysearch.org/ark:/61903/1:1:VXRS-CVZ

Death record gives mother's name as Mary J.

www.familysearch.org/ark:/61903/1:1:N7ND-GPJ

This is just a little information to get us started hopefully more IOM information can be added.