Where does “keiser” come from?

keiser (Old Frisian) comes from Proto-Germanic kaisaraz, from Latin Caesar, from Latin caesaries, from Proto-Indo-European kéysero- — hair.

Ancestry of “keiser”, step by step

StepLanguageWordMeaning
1Proto-Germanickaisarazemperor
2LatinCaesarJulius Caesar; emperor
3Latincaesariesor hair
4Proto-Indo-Europeankéysero-hair
Every word from Proto-Indo-European kéysero- →Every word from Latin caesaries →Every word from Latin Caesar →