Where does “-ї́н” come from?

-ї́н (Ukrainian) comes from Old East Slavic -инъ, from Proto-Slavic -inъ, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “-ї́н”, step by step

StepLanguageWordMeaning
1Old East Slavic-инъ—
2Proto-Slavic-inъ-ine; Creates singulatives, mostly with...
3Proto-Indo-European-iHnosCreates adjectives of materials
4Proto-Indo-European-no-adjectival suffix

Words derived from “-ї́н”

Every word from Proto-Indo-European -no- →Every word from Proto-Indo-European -iHnos →Every word from Proto-Slavic -inъ →