Where does “Swahilian” come from?

Swahilian (English) comes from English ān, from Middle English ān, from Old English ān, from Proto-West Germanic ain, from Proto-Germanic ainaz, from Proto-Indo-European óynos — one; single.

Swahilian (English): Of or relating to the Swahili-speaking people

Definitions

  1. Of or relating to the Swahili-speaking people

Ancestry of “Swahilian”, step by step

Swahilian traces back through two separate lines of ancestry.

via English ān

StepLanguageWordMeaning
1Englishān
2Middle Englishāna, an indefinite article
3Old Englishānlonely; entirely alone, solitary, single; one
4Proto-West Germanicainone
5Proto-Germanicainazone; some
6Proto-Indo-Europeanóynosone; single

via English Swahili

StepLanguageWordMeaning
1EnglishSwahiliAn agglutinative language of the Bantu branch...
2SwahiliMswahiliA Swahili person
3Swahilim-The prefix for noun class 1 denoting humans; The...
4Arabicسَوَاحِلcoastal dwellers
5Arabicسَاحِلcoast; boundary, coast; border of the desert
Every word from Proto-Indo-European óynosEvery word from Proto-Germanic ainazEvery word from Proto-West Germanic ain