Hello Alex, I have Sullivans coming from Kilgarvan in County Kerry . Not too far from Cork. There were 3 brothers whose children all emigrated about the same time to Massachusetts. I know the O'Sullivans split into two groups O'Sullivan Mor (Kerry) and O'Sullivan Beare (Cork). My Sullivans came over 1850 or after. Two names that pop up again and again among my Sullivans are Mortimer and Florence. If you want to compare notes, you can e-mail me off list. Meg