Where does “hirot” come from?

hirot (Old Dutch) comes from Proto-Germanic herutaz, from Proto-Indo-European ḱerh₂- — head, top; horn.

Ancestry of “hirot”, step by step

StepLanguageWordMeaning
1Proto-Germanicherutazdeer, stag
2Proto-Indo-Europeanḱerh₂-head, top; horn
Every word from Proto-Indo-European ḱerh₂-Every word from Proto-Germanic herutaz