Source Information
Ancestry.com. Genealogy of that branch of the Irwin family in New York founded in the Hudson River Valley by William Irwin, 1700-1787 [database on-line]. Provo, UT: Ancestry.com Operations, Inc., 2005.Original data: Hosmer, Ralph S. Genealogy of that branch of the Irwin family in New York founded in the Hudson River Valley by William Irwin, 1700-1787. Ithaca, N.Y.: Privately printed for Dudley Marvin Irwin, 1938.