Proto-Slavic *sestra

→ Belarusian сястра (inherited)

→ Bulgarian сестра (inherited)

→ Czech sestra (inherited)

→ Kashubian sostra (inherited)

→ Old Church Slavonic сестра (inherited)

→ Lower Sorbian sotša (inherited)

→ Upper Sorbian sotra (inherited)

→ Lithuanian sesuo (cognate)

→ Macedonian сестра (inherited)

→ Polish siostra (inherited)

→ Russian сестра (inherited)

→ Rusyn сестра (inherited)

→ Serbo-Croatian sestra (inherited)

→ Serbo-Croatian сестра (inherited)

→ Slovak sestra (inherited)

→ Slovene sestra (inherited)

→ Ukrainian сестра (inherited)