1799 He was named co-executor of his father's estate along withbrothe r, Samuel.
Some say he died in OH but his will was probated in Lancaster Co, PA.T he will was proved 5/12/1802 and named only his brother Samuel, whoals o served as executor.
But the Ohio Genealogical Quarterly says:
044. Irwin, Wm, dec'd. Oct. 26, 1809. Adm-Zabid RAndell, Jenks Wait& W m Foley. Appr- robert Culbertson, Joseph Hickman & John Foley.Mention s- Wm Irwin & wife, Harriet, late Whiteman.