When Jacob Thalmann was born on 23 January 1710, in Wiezikon bei Sirnach, Wiezikon, Thurgau, Switzerland, his father, Hans Conrad Thalmann, was 27 and his mother, Barbara Schiltknecht, was 24. He married Barbara Steinemann on 29 June 1732, in Sirnach, Thurgau, Switzerland. They were the parents of at least 2 sons and 2 daughters. He died on 10 December 1788, in Sirnach, Thurgau, Switzerland, at the age of 78.