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Male Isaac Lyman Click to view Isaac Lyman in the family tree

1   Isaac's father was Moses Lyman and his mother was Mindwell Sheldon.  His paternal grandparents were Moses Lyman and Ann Unknown. He had six brothers and three sisters, named Moses, Elias, Noah, Job, Seth, Simeon, Theodosia, Phebe and Hannah.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