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

Isaac was born on January 15th, 1802.1   Isaac's 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, Otis and Laura.  He was the second 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