tinnatarriff ryan

looking for info on john callaghan & catherine ryan who married 17 /  feb /1859 at cappamore rc church, catherine,s name was recorded as johanna on the parish record & then either kate or catherine & on one occasion as mary on the birth records of their children.  the children,s church records were margaret 10/5/1861 at drumcluther, timothy 1/8/1865 at dromalty,john 21/2/1868 at gurt? caherconlish (civil record only), catherine(kitty) 14/12/1869 at pallesbeg, ellen 7/4/1873 at tinnatarriff, anne 5/6/1875 at tinnatarriff , alice 8/1/1877 at tinnatarriff. a   john callaghan & patrick ryan were witnesses at the marriage & probably were the parents. from an entry in the cancelled rate books john callaghan was residing with matthew ryan (roe)  & james ryan (roe) in tinnatarriff when ellen,anne & alice were born.  their mother catherine was born about 1835/8 before parish records for cappamore or caherconlish so perhaps she was baptised in doon ???  any info on the ryan nickname (roe) would be appreciated  regards trevor