When Peter Röthlisberger was born on 9 August 1722, in Langnau im Emmental, Bern, Switzerland, his father, Christen Roethlisberger, was 32 and his mother, Magdalena Hoffstetter, was 33. He married Catharina Ritter in 1756, in Hasle bei Burgdorf, Bern, Switzerland. They were the parents of at least 3 sons. He died on 5 September 1790, at the age of 68.