If he wasn't given as from a different parish at his marriage, this could be a possibility?
William Kelly
Isle of Man Parish Registers, 1598-2009
christening: 11 January 1846 Michael, Isle of Man
father: William Kelly
mother: Jane Curphy
Name William Kelly
Event Type Christening
Event Date 11 Jan 1846
Event Place Michael, Isle of Man
Gender Male
Marital Status
Father's Name William Kelly
Mother's Name Jane Curphy
Spouse's Name
Spouse's Marital Status
Spouse's Father's Name
Spouse's Mother's Name
Digital Folder Number 004500672
Sue