When Johann Daniel Yantis was born on 24 April 1738, his father, Hans Georg Gentes, was 56 and his mother, Anna Appolonia Vogelgesang, was 28. He married Anna Barbara winter on 27 June 1769. They were the parents of at least 4 sons and 4 daughters. He died about 1805, in Frederick, Maryland, United States, at the age of 67.