Where does “Khitai” come from?

Khitai (English) comes from English Kitai, from Latin Kitai, from Khitan Khita(n).

Ancestry of “Khitai”, step by step

StepLanguageWordMeaning
1EnglishKitaithe Khitan people, their language
2LatinKitaiThe Khitans: a former nomadic people of central Asia
3KhitanKhita(n)—
Every word from Khitan Khita(n) →Every word from Latin Kitai →Every word from English Kitai →