Where does “druif” come from?

druif (Dutch) comes from Middle Dutch druve, from Old Dutch thrūva, 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.

druif (Dutch): grape; grapeshot, shrapnel round