 His usual signature on gems was NATTEP or NATTHP.He also often signs YΔROΣ or YΔROY, a translation of the German word "natter", a water-snake.Georg Kaspar Nagler in his "Künstler-Lexikon", and Heinrich Bolzenthal, followed in Edward Hawkins's "Medallic Illustrations", gave Natter's forenames as "Johann Lorenz"; Natter on his gems and medals and on the title-pages of his publications used only the Christian name "Lorenz" (or Laurent, Laurentius, etc.