Gertrude "Trudy" (Guerette) LaFontaine, 86, died Sunday. She was born in Nashua, the daughter of Joseph and Rose (Decelle) Guerette. A longtime resident of Nashua, she spent her last years in Concord. Survivors include her son Michael of Concord and a nephew, Jack Taylor of Nashua whom she loved like a son, her brother Theodore Guerette of Nashua and a sister, Jeanne Plourde of the Canary Islands, and three grandsons. Private services will be held.