Family/Spouse: Thankful Avery. Thankful (daughter of Benjamin Avery and Thankful Avery) was born on 5 Jul 1755 in Groton, New London County, CT; was christened on 1 Aug 1755 in New London, New London County, CT; died in 1837 in Moravia, Cayuga County, NY. [Group Sheet] [Family Chart]