Curtis or Curtiss is a common English given name and surname of Anglo-Norman origin derived from the Old French curteis (Modern French courtois, surname Courtois) which means "polite, courteous, or well-bred". It is a compound of curt- ″court″ and -eis ″-ish″. The spelling u to render [u] in Old French was mainly Anglo-Norman and Norman, when the spelling o [u] was the usual Parisian French one, Modern French ou [u].