Old Church Slavonic юнъ

← Proto-Balto-Slavic *jauˀnás (inherited)

← Proto-Indo-European *h₂yuh₁en- (derived)

← Proto-Slavic *junъ (inherited)

→ Old Church Slavonic юность (suffix)

→ Latvian jauns (cognate)

→ Russian юный (borrowed)

→ Ukrainian юний (borrowed)