Jacob Heim was born in 1736 in Walddorf, district of Lubingen, Kingdom of Wurtemburg, whence he moved to Moehringen, not far from Stuttgart, Germany. His wife's name was Juliana. At Moehringen were born the following children:
Christian, December 25, 1764, died July 30, 1840; Gottlieb, April 1, 1767, died October 20, 1844; John, April 6, 1770, died October 4, 1830, Jacob, July 27, 1773.