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

Otis was born on April 21st, 1805 in Springville, Michigan.1   Otis' father was Isaac Lyman and his mother was Laura Pierce.  His paternal grandparents were Benjamin Lyman and Widow Foster. He had three brothers and a sister, named Burrill, Harry, Isaac and Laura.  He was the youngest of the five children. He had six half-brothers and five half-sisters, named Jonathan, John, Charles, Milo, Edwin, William Lewis, Sally, Lydia, Charlotte, Eunice and Eulalia.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