My gg grandfather, Patrick C Colgan, arrived in the U.S. 1n 1848. Born in March of 1835, he jumped ship in Savannah, Georgia then disappeared until 1872 when he married Mary Elizabeth Lawson near Atlanta. They settled in Clyo, GA, near Savannah where Patrick worked as a brick mason during the rebuilding after the U.S. Civil War.
Patrick and Mary had 5 children, all of whom survived childhood, but 2 died before 1910. Patrick. himself, died 12-27-1900 at the age of 65.
Since Patrick jumped ship I am unsure of the ship's destination, if he was alone, or where in Ireland he was from. No ship arriving in NY indicated a Patrick Colgan jumping ship and not being on board. For this family, Patrick is my brick wall.

JohnColgan has kindly sent me the following information:

"I have records of the baptisms (Roman Catholic) of two Patrick Colgans in March 1835, one in County Westmeath:
Patrick Colgan, bp.12/3/1835 in Raharney & Rathwire parish, Killucan town, Co Westmeath. His father: John Colgan; his mother: Mary Stanton (nowadays most likely Staunton).

The second in Co Meath (which used be called East Meath, and is contiguous to Co Westmeath):
Patrick Colgan, bp.22/3/1835 in Culmullin parish, Upper Deece barony, Dunshaughlin, Co Meath. His father: Pat Colgan; his mother: Judith Fox."

I am currently looking for information on both of these families, trying to narrow my choices down a little more.