Find Ancestors

i managed to trace my real mother eileen mary barry,but unfortunately she died in 1978.i also found her brothers although sadly there is only now 1 remaining but i also found my aunt ,who lives in canada.i am now tring to trace the family back a bit further ,so if any one know of a margaret kelleher who married a john barry in the late 1920's.my great grandmother 's name was ellen desmond married a jeramiah,lived in deal yard lane,shannon st bandon co cork,there was also a cousin that lived with her named dick kelleher,my grandmother was born in 1899,any help or if this rings a bell,please gt in touch,thanks