Where does “Eichen” come from?

Eichen (English) comes from German eichen, from German Eiche, from Middle High German eich, from Old High German eih, from Proto-West Germanic aik, from Proto-West Germanic *-ilā, from Proto-Germanic aiks, from Proto-Indo-European h₂eyǵ- — goat; oak.

Ancestry of “Eichen”, step by step

StepLanguageWordMeaning
1Germaneichento calibrate, to gauge; oaken, oak
2GermanEicheAn oak tree, an oak, "Quercus"; the common tree;...
3Middle High Germaneich
4Old High Germaneihoak
5Proto-West Germanicaikoak
6Proto-West Germanic*-ilāForms feminine agent nouns, especially of plants and animals
7Proto-Germanicaiksoak tree; oak
8Proto-Indo-Europeanh₂eyǵ-goat; oak
Every word from Proto-Indo-European h₂eyǵ-Every word from Proto-Germanic aiksEvery word from Proto-West Germanic *-ilā