Martloff was born in
Heddernheim on 2 January 1787 or 1789. She was the daughter of an electoral official and was already on stage at the age of twelve. She received her first engagement at the Staatstheater Mainz and from there changed to the
Theater Koblenz. Between 1812 and 1814 Martloff appeared at the
Staatstheater Darmstadt and could be seen there together with
August Wilhelm Iffland. In 1815 she went to the
State Opera in Prague and stayed there until 1824. In time she replaced her colleague
Sophie Schröder as the "first actress". From 1824 followed extensive guest tours to Vienna and Berlin. Martloff married her colleague, the actor
Franz Sontag, and had two daughters with him,
Henriette and
Nina, both of whom later also went to the stage. Their son
Karl Sontag became an actor and playwright. In 1837, Sontag retired from the stage and settled in Dresden. She died there on 10 April 1865 at age 77 and found her last resting place at the
Old Catholic Cemetery in Dresden. ==Roles==