Where does “ভূটান” come from?

ভূটান (Assamese) comes from Assamese ভোট, from English Vote, from Latin vōtum, from Latin votus, from Latin vovere, from Latin voveo, from Proto-Italic wogʷeō, from Proto-Indo-European h₁wegʷʰ- — to promise, to vow; to praise.

Ancestry of “ভূটান”, step by step

ভূটান traces back through two separate lines of ancestry.

via Assamese ভোট

StepLanguageWordMeaning
1AssameseভোটBhutanese; Bhutan; vote
2EnglishVoteA person from Votia or of Votic descent
3Latinvōtumpromise, dedication, vow, solemn pledge
4Latinvotusvowed, promised; devoted to (a deity); having been vowed
5Latinvoverethird-person plural perfect active indicative of...
6LatinvoveoI vow, promise; I dedicate or devote to a deity;...
7Proto-ItalicwogʷeōI vow, promise; dedicate or devote to a deity; I...
8Proto-Indo-Europeanh₁wegʷʰ-to promise, to vow; to praise

via Assamese অন্ত

StepLanguageWordMeaning
1Assameseঅন্তend
2Sanskritअन्तnear; last; handsome, lovely
3Proto-Indo-Europeanh₂ént-end, limit, forehead
Every word from Proto-Indo-European h₁wegʷʰ-Every word from Proto-Italic wogʷeōEvery word from Latin voveo