Where does “북해도” come from?

북해도 (Korean) comes from Japanese 北海道, from Latin -dō, from Proto-Germanic -dô, from Sicilian di, from Latin dē, from Latin post, from Latin poste, from Proto-Italic posti — afterwards, post; by, at.

Ancestry of “북해도”, step by step

StepLanguageWordMeaning
1Japanese北海道North Sea Circuit
2Latin-dōto put
3Proto-Germanic-dô
4SiciliandiUsed to indicate possession, after the thing owned and before the owner; of; ’s
5Latinof; concerning; about
6Latinpostbehind; after, since, besides, except; behind,...
7Latinposteablative singular of postis
8Proto-Italicpostibehind, after
9Proto-Indo-Europeanpóstiafter
10Proto-Indo-Europeanpósafterwards, post; by, at
Every word from Proto-Indo-European pósEvery word from Proto-Indo-European póstiEvery word from Proto-Italic posti