Where does “Eichbaum” come from?

Eichbaum (German) comes 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 “Eichbaum”, step by step

Eichbaum traces back through two separate lines of ancestry.

via German Eiche

StepLanguageWordMeaning
1GermanEicheAn oak tree, an oak, "Quercus"; the common tree;...
2Middle High Germaneich
3Old High Germaneihoak
4Proto-West Germanicaikoak
5Proto-West Germanic*-ilāForms feminine agent nouns, especially of plants and animals
6Proto-Germanicaiksoak tree; oak
7Proto-Indo-Europeanh₂eyǵ-goat; oak

via German baum

StepLanguageWordMeaning
1Germanbaumtree
2Middle High Germanboumtree
3Old High Germanboumtree, beam
4Proto-West Germanicbaumtree; beam
5Proto-GermanicbaumazAlternative form of *bagmaz; tree, beam, balk;...
6Proto-Indo-Europeanbʰew-to grow, swell; to swell, wax, grow; to blow; to...
Every word from Proto-Indo-European h₂eyǵ-Every word from Proto-Germanic aiksEvery word from Proto-West Germanic *-ilā