Proto-Slavic *otrokъ

→ Czech otrok (inherited)

→ Kashubian òtrok (inherited)

→ Old Church Slavonic отрокъ (inherited)

→ Old Church Slavonic отрочѧ (mention)

→ Polish otrok (inherited)

→ Polabian våtrük (inherited)

→ Russian отрок (inherited)

→ Slovak otrok (inherited)

→ Slovene otrok (inherited)