Birth Name: Peter Killian Gallagher
Place of Birth: New York City, New York, U.S.
Date of Birth: August 19, 1955
Peter Gallagher is an American actor, musician, and writer. He is of Irish descent. Peter is married to Paula Harwood, with whom he has two children, including actress Kathryn Gallagher.
Peter’s paternal grandfather was Thomas Francis Gallagher, Sr. (the son of Peter Gallagher and Catherine Burns). Thomas was born in Pennsylvania, to Irish parents. Peter’s great-grandfather Peter Gallagher was the son of Patrick Gallagher and Bridget McMenemy.
Peter’s paternal grandmother was Brigid/Bridget Gallagher (the daughter of James Gallagher and Sarah Kelly). Brigid was born in Pennsylvania, of Irish heritage. James was the son of John Gallagher. Sarah was the daughter of John Kelly and Bridget.
Peter’s maternal grandfather was Denis/Dennis Joseph O’Shea (the son of James O’Shea and Mary Ryan). Denis was Irish.
Peter’s maternal grandmother was Katherine/Catherine Mary “Katie” Killian (the daughter of Lawrence/Laurentio Killian and Sarah Connolly). Katherine was born in Co. Roscommon, Ireland.
Sources: Genealogy of Peter Gallagher – http://www.genealogy.com
Peter’s paternal grandparents, Thomas Francis Gallagher, Sr. and Brigid/Bridget Gallagher, on the 1910 U.S. Census – https://familysearch.org
Peter’s mother on the 1930 U.S. Census – https://familysearch.org
Marriage record of Peter’s maternal grandparents, Denis/Dennis Joseph O’Shea and Katherine/Catherine Mary “Katie” Killian – https://www.familysearch.org