Data source is the pamphlet, "Genealogy of One Branch of the Jacob Mumma Family", written by Ellen Landis Mumma in 1970.
In the 1900 census, Mumma Hess is living with his uncle and aunt, Peter B. and Mary A. Hess.
Father:John B. HESS (b. 25 OCT 1862, Lancaster Co., PA - d. 17 FEB 1890, Lititz, Lancaster Co., PA) Mother:Anna Brubaker MUMMA (b. 2 JUN 1867, Lancaster Co., PA - d. 23 JUN 1896, Landisville, Lancaster Co., PA)