Fehlmach
Fehlmach is a surname of German origin. The name is derived from the Middle High German words "vêl" meaning "false" or "wrong" and "mach" meaning "work" or "deed." Therefore, Fehlmach literally translates to "false work" or "wrong deed." This likely indicates a historical occupational or descriptive nickname for an ancestor who was perceived as being a poor craftsman, or perhaps someone who was known for performing tasks incorrectly or deceitfully.
Like many European surnames, Fehlmach would have originated as a way to identify individuals within communities.