GUILDERLAND — “On Dec. 15, 1940, Roc’sanna Tresa (née Martelli) Rivers was born in Schenectady, New York to the late Rocco and Mildred Martelli,” wrote Mrs. Rivers’s family in a tribute. “And so began a 78-year-long story of a strong, fiercely stubborn, mischievous, humorous, and all-around marvelous woman.