Where does “Neptunian” come from?

Neptunian (English) comes from English Neptune, from Middle English Neptune, from Latin Neptūnus, from Proto-Italic neptūnos, from Proto-Indo-European nébʰos, from Proto-Indo-European -os — Creates action nouns or result nouns from verbs;...

Neptunian (English): Of or pertaining to Neptune, the Roman god of...

Definitions

  1. Of or pertaining to Neptune, the Roman god of...

Ancestry of “Neptunian”, step by step

Neptunian traces back through 3 separate lines of ancestry.

via English Neptune

StepLanguageWordMeaning
1EnglishNeptuneeighth planet in the solar system
2Middle EnglishNeptune
3LatinNeptūnusNeptune god of the sea
4Proto-Italicneptūnos
5Proto-Indo-Europeannébʰoscloud; mist, moisture
6Proto-Indo-European-osCreates action nouns or result nouns from verbs;...

via French neptunien

StepLanguageWordMeaning
1FrenchneptunienNeptunian

via Latin Neptunius

StepLanguageWordMeaning
1LatinNeptuniusof or pertaining to the Roman god Neptune

Words derived from “Neptunian

Every word from Proto-Indo-European -osEvery word from Proto-Indo-European nébʰosEvery word from Proto-Italic neptūnos