Beloved husband of the late Diane (Mack) Harrington. Loving father of Catherine (Peter) Donnelly and Timothy (Rachel) Harrington. Loving Paka of Peter (Danielle) Donnelly, Maggie Donnelly, Matthew (Fiancé – Anna Fricker) Donnelly. Great-grandfather to Eliana Donnelly. Pre-deceased by loving brothers and survived by nieces and nephews. Friends may call Sunday, January 4, 2026, from 1-5 p.m. at the Dietrich Funeral Home, Inc., 2480 Kensington Ave., Amherst, N.Y. 14226. A Mass of Christian Burial will be celebrated on Monday, January 5, 2026, at 10 a.m. at St. Joseph University Church, 3269 Main St., Buffalo, N.Y. 14214. Please assemble at church. In lieu of flowers, donations may be made to the Caregiver Support Program at VA Western New York or to the American Diabetes Association. Timothy F. Harrington Jr. graduated from Timon High School and Canisius College with a degree in English and minors in Philosophy and languages. He taught at Holland Central before returning to Canisius for graduate studies. He decided to forgo a master’s in education and complete the science requirements to apply to the UB School of Medicine. He completed a residency in Family Practice before accepting his commission to the U.S. Navy. He served at the Pensacola Naval Air Station during the Vietnam War where he modernized the Family Practice Residency Program. After the war he returned to Buffalo and launched his own private practice, with his wife Diane who was a nurse, which he enjoyed until his retirement in 2015. His hobbies included genealogy, photography, amateur radio (KD2OE) and magic (IBM Ring 12).