Hope you still are on the same email.
My Cullen line is in Grangecon, Ballynure, Wicklow. They live on the land owned by David Mahoney. They are most likely related to the Mahoney family. They have connections in both Northern Wicklow and Dublin. There are also 2 other Cullen families in the area. I don't know if they are related but I would assume so. Jeremiah, Catherine Cullen and daughter Mary all came to the US in 1852. They sailed from New Ross to Quebec Canada. From there they walked down into Ohio where they spent a couple of years (no records of this) and by 1857 they are in Dubuque co. Iowa where Mary marries Michael Gilligan. Jeremiah and Catherine lived their lives out with Mary and family.