My great grandmother, Margaret (Maggie) Bohan was born in Ireland c 1850 and died in Jersey City, New Jersey in 1924. She was the daughter of Cornelius Bohan and Ellen Sheehan/Sheahan. She married Patrick J. Donovan in New York City on 18 June 1876.
Patrick was born in Ireland c 1850 and died in NYC or New Jersey in 1906. He was the son of Patrick Donovan and Catherine Donevan. I do not know if Catherine's maiden name was Donevan, or if it was a variation of her married name.
Patrick was a boxer who was known along the New England/New York/Eastern Canada circuit as Danger Donovan.... He may also have been known as the same in Ireland before he emmigrated.He may have emmigrated first to Canada before going to NYC.
They had at least 6 children - I have names and dates for my grandmother, Annie Dononvan (1877-1961 - Married to William Davison); Patrick (1879); Michael (1881-1938); Timothy (1887-1911).
Patrick and Margaret are both buried in Old Calvary Cemetery in NYC.
I have no other knowledge of where in Ireland these Bohan, Sheehan, and Donovan lines originated or when they immigrated to the US.