My ggg-grandma Sarah/Sorcha/Serae Garvey was from Boyle, she married Luíseach/Lucii Conroy and they had 13 children including my gg-grandfather James Gervé Conroy. I wonder if they could have been siblings? The closest Garvey to Boyle in the 1749 Elphin Diocese Census seems to have been Cormack Garvin of Ballyconboy, who had three children over 14 at the time of that census. James Gervé was born in 1836, so the dates would be about right. They were most likely cousins if not siblings I would think.