Where does “Kaiser” come from?

Kaiser (Cebuano) comes from English Kaiser, from German kaiser, from Middle High German keiser, from Old High German keisar, from Indonesian kaisar, from Dutch keizer, from Middle Dutch keiser, from Old Dutch keiser — hair.

Ancestry of “Kaiser”, step by step

StepLanguageWordMeaning
1EnglishKaiserAn emperor of a German-speaking country,...
2Germankaiseremperor ruler of certain monarchies; highest monarch
3Middle High Germankeiseremperor
4Old High Germankeisaremperor
5Indonesiankaisaremperor; empress
6Dutchkeizeremperor
7Middle Dutchkeiser
8Old Dutchkeiseremperor
9Proto-Germanickaisarazemperor
10LatinCaesarJulius Caesar; emperor
11Latincaesariesor hair
12Proto-Indo-Europeankéysero-hair
Every word from Proto-Indo-European kéysero-