Proto-Slavic *čьjь

→ Belarusian чый (inherited)

→ Bulgarian чий (inherited)

→ Czech čí (inherited)

→ Old Church Slavonic чии (inherited)

→ Lower Sorbian ceji (inherited)

→ Macedonian чиј (inherited)

→ Polish czyj (mention)

→ Russian чей (inherited)

→ Serbo-Croatian čiji (inherited)

→ Slovak čí (inherited)

→ Ukrainian чий (inherited)