Proto-Slavic *kъrkъ

→ Bulgarian кърчаг (cognate)

→ Czech krk (inherited)

→ Polish kark (inherited)

→ Serbo-Croatian krkače (inherited)

→ Serbo-Croatian кркаче (inherited)

→ Serbo-Croatian krkljati (mention)

→ Serbo-Croatian кркљати (mention)

→ Slovak krk (inherited)

→ Old Czech krk (inherited)