Prois-Olga (Moisakis),55, of Somerville, October 17, 20007. Beloved wife of Spyridon Prois. Devoted Mother of Steven Prois and Maria Lefas & her husband Elias. Loving Grandmother of Dionysios Lefas. Sister of Kosta Moisakis, Nick Moisakis, Alex Moisakis, Frances Koutsouradis and Perry Moisakis. Also survived by many nieces,nephews and relatives. In lieu of flowers donations in her memory may be made to the Dana Farber Cancer Institute, 44 Binney St.,Boston, MA 02115.