Gregorios Papantoniadis, of West Roxbury, Mass.,  passed away on January 31, 2020. Beloved husband of Anastasia (Kilikidis) Papantoniadis. Devoted father of Anastasios Papantoniadis and his wife Nicoletta, Stavros Papantoniadis and his wife Polyxeny, and Constantino Papantoniadis. Loving Papou of Katerina, Stefano, Anastasia, Gregory, Panayoti, and Georgia. Brother of Stavros Papantoniadis and his wife Soula, Pelagia Kalaitzidis, and the late Maro Avramidou, and the late Polixeni Papantoniadis. Brother- in- law Panyiotis Avramidou and the late George Kalaitzidis.  Also survived by many nieces, nephews, relatives and friends. Funeral Service on Monday, February 3, 2020 at St. Nectarios Greek Orthodox Church, 39 Belgrade Ave., Roslindale, MA at 11:30AM. Visitation prior to the Service from 9:30AM to 11:30AM at the church. Relatives and friends are kindly invited to attend.  In lieu of flowers, donations in his memory may be made to St. Nectarios Greek Orthodox Church, 39 Belgrade Ave, Roslindale, MA or to the Hellenic Cardiac Fund for Children, c/o Children's Hospital, 300 Longwood Ave., Boston, MA  02115. Burial in The Gardens Cemetery, West Roxbury, MA.