Where does “ドゥブノ” come from?

ドゥブノ (Japanese) comes from Ukrainian Ду́бно, from Ukrainian дуб, from Proto-Slavic dǫbъ, from Proto-Indo-European dʰanw-.

Ancestry of “ドゥブノ”, step by step

StepLanguageWordMeaning
1UkrainianДу́бно—
2Ukrainianдубoak tree of the genus
3Proto-Slavicdǫbъoak tree; oak
4Proto-Indo-Europeandʰanw-—
Every word from Proto-Indo-European dʰanw- →Every word from Proto-Slavic dǫbъ →Every word from Ukrainian дуб →