Family name origins & meanings
- English : variant of Clough.
- English : metonymic occupational name for a nailer, from Old French clou ‘nail’. Compare Clower.
- Possibly an Americanized spelling of German Klau, a habitational name for someone from Klau near Aachen or Clauen in Lower Saxony, or Glau, a nickname for an astute person, from Old High German, Low German glou, glau ‘circumspect’.