Fritz is a common German male name. The name originated as a German diminutive of Friedrich or Frederick (Der Alte Fritz, and Stary Fryc were common nicknames for King Frederick II of Prussia and Frederick III, German Emperor), as well as of similar names including Fridolin and, less commonly, Francis. Fritz (Fryc) was also a name given to German troops by Allies soldier similar to the term Tommy. Other common bases for which the name Fritz was used include the surnames Fritsche, Fritzsche, Fritsch, Frisch(e) and Frycz. Below is a list of notable people with the name "Fritz". Surname.
https://en.wikipedia.org/wiki/Fritz