Any of these look likely? but you would really need to get a birth record for one of the children, which would give the mothers maiden name.
OTTO
1876 Terence Devlin/Margaret Henry (Cookstown, Tyrone)
1877 Terence Devlin/Alice Doyle (Cookstown, Tyrone)
1884 Terence Devlin/Mary Kelly (Castleblayney, Armagh)
1889 Terence Devlin/Sarah Lunney (Dungannon, Tyrone)