Where does “デヴォン紀” come from?

デヴォン紀 (Japanese) comes from Japanese デヴォン, from English Devon, from Old English Defenas, from Latin Dumnonii, from Proto-Celtic dubnos, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Ancestry of “デヴォン紀”, step by step

デヴォン紀 traces back through two separate lines of ancestry.

via Japanese デヴォン

StepLanguageWordMeaning
1JapaneseデヴォンDevon
2EnglishDevonOne of a breed of hardy cattle originating in...
3Old EnglishDefenasDevonians
4LatinDumnoniiA tribe of Britannia
5Proto-Celticdubnosdeep; world
6Proto-Indo-Europeandʰewbʰ-deep
7Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via Japanese 紀

StepLanguageWordMeaning
1Japanese紀chronicle, written record
2Middle Chinese紀—
Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Indo-European dʰewbʰ- →Every word from Proto-Celtic dubnos →