Proto-Slavic *sěverъ

→ Bulgarian север (inherited)

→ Czech sever (inherited)

→ Latin caurus (cognate)

→ Macedonian север (inherited)

→ Polish Siewiera (mention)

→ Polish Sewera (mention)

→ Russian север (inherited)

→ Russian сивер (inherited)

→ Serbo-Croatian sever (inherited)

→ Serbo-Croatian север (inherited)

→ Serbo-Croatian sjever (inherited)

→ Serbo-Croatian сјевер (inherited)

→ Serbo-Croatian с́евер (inherited)

→ Serbo-Croatian śever (inherited)

→ Slovak sever (inherited)

→ Slovene sever (inherited)