Jacob Whitmer (1800–1856) was the second born child of Peter Whitmer, Sr. and Mary Musselman. He is primarily remembered as one of the Eight Witnesses of the Book of Mormon's Golden Plates. Born January 27, 1800, Jacob Whitmer moved with his parents' family to New York, where he married Elizabeth Schott on September 29, 1825. Jacob and Elizabeth had nine children together, only three of which survived to adulthood.