Proto-Slavic *sedmь

→ Belarusian сем (inherited)

→ Bulgarian седем (inherited)

→ Czech sedm (inherited)

→ Kashubian sétmë (inherited)

→ Old Church Slavonic седмь (inherited)

→ Lower Sorbian sedym (inherited)

→ Upper Sorbian sydom (inherited)

→ Macedonian седум (inherited)

→ Polish siedem (inherited)

→ Polabian sidĕm (inherited)

→ Russian семь (inherited)

→ Rusyn сім (inherited)

→ Serbo-Croatian sedam (inherited)

→ Serbo-Croatian седам (inherited)

→ Slovak sedem (inherited)

→ Slovene sedem (inherited)

→ Silesian siedym (inherited)

→ Ukrainian сім (inherited)

→ Old Polish siedm (inherited)