Where does “Inner Mongolia” come from?

Inner Mongolia (English) comes from English Mongolia, from English Mongol, from Mongolian ᠮᠣᠩᠭᠣᠯ, from Latin -icus, from Ancient Greek -ικός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.

Ancestry of “Inner Mongolia”, step by step

Inner Mongolia traces back through two separate lines of ancestry.

via English Mongolia

StepLanguageWordMeaning
1EnglishMongolia
2EnglishMongolA person from Mongolia; a Mongolian; A member of...
3MongolianᠮᠣᠩᠭᠣᠯMongol, Mongolian
4Latin-icusbelonging to; derived from; of or pertaining to;...
5Ancient Greek-ικόςof or pertaining to, in the manner of; -ic
6Ancient Greek-κόςforms adjectives with the sense of 'of or...
7Proto-Indo-European-ḱos-y, -ic

via English inner

StepLanguageWordMeaning
1EnglishinnerBeing or occurring inside, situated farther in,...
2Middle Englishinner
3Old Englishinnerainner, interior
4Proto-Indo-Europeanh₁énin
Every word from Proto-Indo-European -ḱos