Where does “Heerjansdam” come from?

Heerjansdam (Dutch) comes from Middle Dutch hêre, from Old Dutch hēro, from Old High German hēriro, from Proto-Germanic hairaz, from Proto-Indo-European (s)ḱeh₃- — darkness, shadow.

Ancestry of “Heerjansdam”, step by step

StepLanguageWordMeaning
1Middle Dutchhêrelord
2Old Dutchhēro—
3Old High Germanhēriro—
4Proto-Germanichairazgrey; aged; old; lofty; distinguished
5Proto-Indo-European(s)ḱeh₃-darkness, shadow
Every word from Proto-Indo-European (s)ḱeh₃- →Every word from Proto-Germanic hairaz →Every word from Old High German hēriro →