Proto-Slavic *gǫ̑sь

→ Belarusian гусь (inherited)

→ Bulgarian гъска (inherited)

→ Czech husa (inherited)

→ Kashubian gãs (inherited)

→ Old Church Slavonic гѫсь (inherited)

→ Lower Sorbian gus (inherited)

→ Upper Sorbian hus (inherited)

→ Macedonian гуска (inherited)

→ Polish gęś (inherited)

→ Polish gąska (inherited)

→ Polabian gǫs (inherited)

→ Romanian gâscă (derived)

→ Romanian gânsac (derived)

→ Russian гусь (inherited)

→ Serbo-Croatian guska (inherited)

→ Serbo-Croatian гуска (inherited)

→ Slovak hus (inherited)

→ Slovene gos (inherited)

→ Ukrainian гуска (inherited)

→ Ukrainian гуся (derived)

→ Ukrainian гуси (derived)