When Johann Caspar Abegg was born on 9 June 1765, in Wiedikon, Zürich, Zürich, Switzerland, his father, Hans Kaspar Abegg, was 34 and his mother, Verena Morf, was 48. He married Maria Dorothea Labhart on 14 July 1798, in Wiedikon, Zürich, Zürich, Switzerland. They were the parents of at least 2 sons and 2 daughters. He died on 23 November 1815, in his hometown, at the age of 50, and was buried in Wiedikon, Zürich, Zürich, Switzerland.