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Female Lydia Alvord Click to view Lydia Alvord in the family tree

Lydia was born on September 7th, 1748 in Northampton, MA.1   Lydia's father was Saul Alvord and her mother was Martha Churchill.  Her paternal grandparents were John Alvord and Dorcas Lyman; her maternal grandparents were Joseph Churchill and Lydia Dickenson. She had two brothers and three sisters, and also a sibling of unknown gender, named Saul, Saul, Martha, Ann, Eunice and Infant.  She was the second oldest of the seven children.  She died at the age of 1 on June 22nd, 1750.1 

1 phelps.FTW @ Tree #0105
Further sources/citations:
World Family Tree Vol. 3, Ed. 1 @ Tree #0105, 0105.ftw @ Tree #0105