Martinez, William J. of Centereach, NY on December 20, 2012. Beloved father of Mercedes Masterson and her husband Robert, Beatrice Russo, William Martinez and his wife Jayne, John Martinez and his wife Sandra. Loving grandfather of Toniann, Patrick, John, Anthony, Cassandra, Michael, Justin, and the late Timothy, and step grandchildren Tracy and Robert. Cherished great grandfather of Timothy, Gabrielle, Zoe, John. Devoted brother of Mercedes Gonzalez. Visitation Thursday 2-4 & 7-9 P.M., Prayer Service Friday 10A.M. at the O.B. Davis Funeral Homes, 2326 Middle Country Rd., Centereach. Interment Saturday Calverton National Cemetery.