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Female Sarah Dewey Click to view Sarah Dewey in the family tree

Sarah was born on May 13th, 1759 in lebanon, CT.1   Sarah's father was Solomon Dewey and her mother was Anna Downer.  Her paternal grandparents were Josiah Dewey and Sarah Huchinson (Hutchinson); her maternal grandparents were Andrew Downer and Sarah. She had five brothers and four sisters, and also a sibling of unknown gender, named Andrew, Silas, Silas, Eleazer, Solomon, Anna, Molly, Elizabeth (Betsy), Hannah and Asahel.1 

1 phelps.FTW @ Tree #1353
Further sources/citations:
World Family Tree Vol. 1, Ed. 1 @ Tree #3310, phelps.FTW, World Family Tree Vol. 4, Ed. 1 @ Tree #2332, 2332.ftw