Gwendolyn M. Vallancourt of Brockton, MA passed away on Friday, June 18, 2021, at home in Lancaster, NY. Born on December 2, 1925, in Brockton, MA, she is the daughter of Ralph and Lois (Whynock) Thompson. She worked as an Accountant for Carey’s Oil in Brockton, MA. Gwendolyn was the loving mother of Paul Vallancourt and the late Donna O’Connor; dear grandmother of Kathleen, Maureen, Christine, Mathew, Colleen,Ryan, and the late Timothy; great-grandmother of Kyle, Mathew, Jr., Nora, Ryan, Jr., Shaemus, Tyler, Nicole, Brandon, Autumn, Ariana, Alaxander, Amanthis, Abraham,and the late Cory and 8 great-great-grandchildren. Funeral services will be private. Condolences may be offered to the family at langefuneralhomeinc.com.