Hampden District Attorney Anthony D. Gulluni has identified the three family members who perished Sunday morning in a two-alarm apartment building fire in Springfield.The bodies of Aden Abdakadr — whose age Gulluni said has not been determined — and his children, Ahmed Ahmed, 2, and Fatumo Ahmed, 1, were located in a second-floor apartment at 49 Belmont Ave.Springfield Mayor Domenic Sarno and officials from the Islamic Society of Western Massachusetts said Sunday the family were members of the city’s Somali community.