O'Brien, John J. "Jack", Jr. of Jamaica Plain on February 9, 2018. Beloved husband of Anna O. (Baryski). Loving father of John J. O'Brien, III of Jamaica Plain and Kimberly A. O'Brien of Hanson. Brother of Patricia Feeney of Marshfield, Maureen Murray of Vermont, Janet Medeiros of Rhode island, Susan MacLaren of Vermont, Robert O'Brien of Roslindale, Barbara Devico of Dorchester and the late Kenneth and Ronald O'Brien. Also survived by many nieces and nephews. Visiting hours at the Brady & Fallon Funeral Home 10 Tower St. (Opp. Forest Hills MBTA Station) Jamaica Plain on Tuesday February 13 from 4-8 PM. A Funeral Mass will be celebrated at Our Lady of Lourdes Church 14 Montebello Rd. Jamaica Plain on Wednesday February 14 at 10 AM. Relatives and friends are invited to attend. Interment Mt. Benedict Cemetery. In lieu of flowers, donations in Jack's memory may be made to Down Syndrome - Autism Connection, PO Box 740893, Arvada, CO. 80006.