I’m not sure if anyone will see this after so many years, but I am working on the Roust/Roost family of Newfoundland. My great grandmother was a roast who married a Sullivan in St. John’s in 1860. Regarding the original post about Ellen Dwyer Carroll, she was baptized in St. John’s 11 June 1828. Her parents were married in St. John’s as well, her father James Dwyer was indeed from county Kilkenny in Ireland, but her mother Anne Roust was from Renews in Newfoundland.