Proto-Slavic *do

→ Czech do (inherited)

→ Old Church Slavonic до- (inherited)

→ Old Church Slavonic до (inherited)

→ Lower Sorbian do (inherited)

→ Lower Sorbian dojś (mention)

→ Polish do (inherited)

→ Polabian dü (inherited)

→ Russian до- (inherited)

→ Russian до (inherited)

→ Serbo-Croatian do (inherited)

→ Serbo-Croatian до (inherited)

→ Slovak do (inherited)

→ Slovene do (inherited)

→ Ukrainian до (inherited)