Looking for any information on Patrick Duffy born 1804 in Armagh. He married Alice Burns in 1833 (she was born 1812 Armagh). Between 1833 and 1856 they had 15 children, all born in Armagh. They were Catholic and immigrated to Iowa, USA in 1857 aboard the ship Calhoun. They arrived in New York May 1857. The children were: Catherine, Mary, Michael Bernard, John, Patrick, Bridget, James, Francis, Owen Sylvester, Hugh N, Peter Henry, Matthais M, Edward J, Thomas, and Joseph Charles. All but the two oldest girls went on to have families, all of which were equally large. There are many, many descendents in the Fairbank, Iowa area and annual reunions are still held.
Patrick has been associated with Creggan and Newtown-Hamilton. Alice has been linked to Tullysalon. I've examined a number of records and have only found Armagh mentioned so I'm not sure if the above mentioned are accurate. Many of the children eventually married spouses (in Iowa) that were also from Armagh but it is unknown if they knew the families prior to immigrating.