Where does “Eerste Dwarsdiep” come from?

Eerste Dwarsdiep (Dutch) comes from Dutch diep, from Middle Dutch diep, from Old Dutch diep, from Proto-West Germanic deup, from Proto-Albanian deupa, from Proto-Indo-European dʰewp-, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Ancestry of “Eerste Dwarsdiep”, step by step

Eerste Dwarsdiep traces back through 3 separate lines of ancestry.

via Dutch diep

StepLanguageWordMeaning
1Dutchdiepdeep, down low; profound
2Middle Dutchdiep
3Old Dutchdiepdeep
4Proto-West Germanicdeupdeep
5Proto-Albaniandeupacradle, deposit
6Proto-Indo-Europeandʰewp-Alternative form of *dʰewbʰ-; deep
7Proto-Indo-Europeandʰewbʰ-deep
8Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via Dutch dwars

StepLanguageWordMeaning
1Dutchdwarsin a crosswise direction, transverse, at right...
2Middle Dutchdwers
3Old Saxonthwerhcontrary, against; bent, crooked
4Proto-Germanic*þwerh
5Proto-Germanicþwerhazcross, adverse
6Proto-Germanicþerh-
7Proto-Indo-Europeanterkʷ-to turn, spin

via Dutch eerst

StepLanguageWordMeaning
1Dutcheerstfirst, at first, before something else; at first,...
2Middle Dutchêerstfirst
3Old Dutchērist
4Proto-Germanicairistearliest, at first; superlative degree of *airi
5Proto-Germanicairiearly
6Proto-Germanicairizearlier, before; comparative degree of *airi
Every word from Proto-Indo-European dʰewh₂-