Save Type Surname (from nickname) Usage German Pronounced Pron. /ˈkaɪ̯.zɐ/ [key·simplify] Meaning & HistoryExpand Links From Middle High German keiser meaning "emperor", originally a nickname applied to someone who acted kingly. The title ultimately derives from the Roman name Caesar. Related NamesDetails RootkeisarOther Languages & CulturesCsászár(Hungarian) Categories American sprinters, brand names, ends in -er, German words, isograms, leadership, nicknames, noble titles, playwrights