Thanks for your data in finding of this question. The Find A grave page for his son William tells of Mary
""s/o Samuel Morey b. 15 Aug 1750 Voluntown, New London, CT, USA
s/o Mary Morey""
And Polly is another nickname for Mary as well.
Connecticut Births and Christenings
Name Samuel Morey
Birth Date 15 Aug 1750
Birthplace VOLUNTOWN TWP,NEW LONDON,CONNETICUT
Father's Name Joseph Moery
Mother's Name Mary
Citing this Record
"Connecticut Births and Christenings, 1649-1906," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F74C-NRS
: accessed 22 March 2016), Samuel Mory, 15 Aug 1750; citing ; FHL microfilm unknown.
He is most likely buried somewhere in Connecticut just can't find it.