Where does “Walnussbäumchen” come from?

Walnussbäumchen (German) comes from German Walnussbaum, from German Walnuss, from English walnut, from Middle English walnote, from Old English wealhhnutu, from Old English wealh, from Old English īeġ, from Proto-West Germanic auwju — water.

Ancestry of “Walnussbäumchen”, step by step

StepLanguageWordMeaning
1GermanWalnussbaumwalnut tree
2GermanWalnusswalnut
3EnglishwalnutA hardwood tree of the genus "Juglans"; A nut of...
4Middle EnglishwalnoteAlternative form of walnot
5Old Englishwealhhnutuwalnut
6Old Englishwealhforeigner; Briton or Welshman; slave
7Old Englishīeġisland
8Proto-West Germanicauwjufloodplain; meadow; island
9Proto-Germanicawjōfloodplain; meadow; island
10Proto-Germanicagwjō
11Proto-Indo-Europeanh₂ékʷeh₂water
Every word from Proto-Indo-European h₂ékʷeh₂