Proto-Slavic *kogъda

→ Bulgarian кога (inherited)

→ Kashubian czedë (inherited)

→ Old Church Slavonic къгда (inherited)

→ Lower Sorbian gdy (inherited)

→ Upper Sorbian hdy (inherited)

→ Lithuanian kada (cognate)

→ Macedonian кога (inherited)

→ Polish kiedy (inherited)

→ Polish gdy (inherited)

→ Serbo-Croatian nikad (derived)

→ Serbo-Croatian nikada (derived)

→ Serbo-Croatian никад (derived)

→ Serbo-Croatian kad (inherited)

→ Serbo-Croatian kada (inherited)

→ Serbo-Croatian никада (derived)

→ Serbo-Croatian када (inherited)

→ Serbo-Croatian кад (inherited)

→ Serbo-Croatian кьт (inherited)

→ Serbo-Croatian kăt (inherited)

→ Old Polish kiegdy (inherited)