On Monday, June 19th, 2017, of Greenbelt, MD, at the age of 65. Brother of Mary Ellen Williams, Rose Marie Marshall and James D. Hartnett; brother-in-law of Evelyn Hartnett. Many nieces and nephews also survive. He was preceded in death by his parents, Catherine and Jerome Hartnett, a sister, Kathryn Hartnett, and two brothers, Lawrence and Michael Hartnett. A Memorial Mass will be held at St. Jerome's Catholic Church, 5205 43rd Ave, Hyattsville, MD 20781 on Monday, July 10 at 10:00 a.m. Burial private.