Johanna Driscoll and Bernard Costello

I am researching my wife's great grandparents.Her uncle gave me their names, as Bernard Costello and Johanna Driscoll.They were born in Conception Bay, Newfoundland, according to her uncle.I am making a little headway with Bernard, but can find nothing on Johanna Driscoll.They have a daughter, Anges Rita Costello, and Agnes currently resides in Pennsylvania.This is all the information I have.ANy help would be fantastic!Thank you.