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

1   Lydia's father was Abraham Blackman and her mother was Sarah Loomis.  Her maternal grandparents were Nathaniel Loomis and Sarah Ryley. She had five brothers and three sisters, and also a sibling of unknown gender, named Abraham, Eli, Lemuel, Levi, Nathaniel, Esther, Patty, Sarah and Eleazer.1 

1 phelps.FTW @ Tree #0105
Further sources/citations:
World Family Tree Vol. 3, Ed. 1 @ Tree #3669, 3669.ftw