Where does “ベルーガ” come from?

ベルーガ (Japanese) comes from English Beluga, from Russian белу́га, from Russian -уга, from Ukrainian -ю́га, from Ukrainian -ю́чий, from Proto-Slavic -otь, from Proto-Slavic -otъ, from Proto-Slavic -tъ — Deverbal from mono-syllabic simple stems, forms...

Ancestry of “ベルーガ”, step by step

StepLanguageWordMeaning
1EnglishBelugaAlternative spelling of beluga
2Russianбелу́гаbeluga (European sturgeon)
3Russian-уга
4Ukrainian-ю́гаattached to truncated stems of common nouns, adjectives or verbs to form feminine or masculine nouns, often augmentative or derogatory
5Ukrainian-ю́чий
6Proto-Slavic-otьFrom basic roots, forms derivative nouns
7Proto-Slavic-otъFrom adjectives/adverbs, forms action nouns; From...
8Proto-Slavic-tъDeverbal from mono-syllabic simple stems, forms...
Every word from Proto-Slavic -tъEvery word from Russian -угаEvery word from Ukrainian -ю́чий