Iacobacci, John A. on October 3, 2017 of Port Jefferson, LI. Beloved husband of Nina. Loving father of Susan Mecionis and her husband John; John Iacobacci and his wife Janet and Judy Umbach and her husband Fred. Cherished grandfather of Nicole, Johnny, Amanda, Lauren, Freddie, Lindsay, Stephanie, Victoria and Danny. Adored great grandfather of Madison. Reposing at Casimir Funeral Homes, 4839 Nesconset Highway, Port Jefferson Station, NY. Visitation on Thursday, October 5th from 2-7 PM. Prayer service Friday at 10 AM. Interment to follow at Long Island National Cemetery.