Susannah Caroline "Cal" Harris was born at Lyrand, Iowa, in 1855, the daughter of Elisha Harris and Margaret Patterson. Her birth came a year after her family had come to Post Twp, Allamakee county, Iowa, from Morgan County, Ohio. She died from complications from diabetes at Postville, Iowa in 1916.
She married John Alfred Hammel in 1888 at Lybrand, and they became the parents of eleven children. John Hammel was born in 1856 in Frankville, Iowa, the son of John Hammel and Margaret Jokers. John died in 1926 at Postville. Both Cal and John are buried at the Postville City Cemetery.