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

Silas was born on July 24th, 1794.1   Silas' father was Silas Lyman and his mother was Parnee Brown.  His paternal grandparents were Benjamin Lyman and Widow Foster; his maternal grandfather was William B. Brown. He had six brothers and two sisters, and also a sibling of unknown gender, named Calvin, Luther, John, William B., Benjamin F., Orin, Parnee, Parthenia and Vashti.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