Where does “thrūva” come from?

thrūva (Old Dutch) comes from Proto-West Germanic þrūbō, from Proto-West Germanic þrubō, from Proto-Germanic þrubô, from Proto-Indo-European trup-ḗn ~ trup-nés, from Proto-Indo-European -ḗn — Derives nouns from roots.

Ancestry of “thrūva”, step by step

StepLanguageWordMeaning
1Proto-West Germanicþrūbōcluster; grape
2Proto-West Germanicþrubōcluster, bunch
3Proto-Germanicþrubô
4Proto-Indo-Europeantrup-ḗn ~ trup-nés
5Proto-Indo-European-ḗnDerives nouns from roots

Words derived from “thrūva

Every word from Proto-Indo-European -ḗnEvery word from Proto-Indo-European trup-ḗn ~ trup-nésEvery word from Proto-Germanic þrubô