Lamar was born in Austria to two Jewish parents (but she was raised Catholic) and married c. 1933 to a fascist (but not Nazi). Her husband was so controlling she had to flee from him disguised as a maid. Already famous for making a notorious erotic film in Germany,
she got an immediate contract in Hollywood. During WWII, she used her knowledge gained from her former husband’s armament firm to co-design a frequency hopping system to keep torpedoes on course. The invention is important to technology today such as Wi-Fi.