Where does “Isca Dumnoniorum” come from?

Isca Dumnoniorum (Latin) comes from Latin Dumnonii, from Proto-Celtic dubnos, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Ancestry of “Isca Dumnoniorum”, step by step

StepLanguageWordMeaning
1LatinDumnoniiA tribe of Britannia
2Proto-Celticdubnosdeep; world
3Proto-Indo-Europeandʰewbʰ-deep
4Proto-Indo-Europeandʰewh₂-smoke; mist, haze
Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Indo-European dʰewbʰ- →Every word from Proto-Celtic dubnos →