Russian сойка

← Belarusian со́я (cognate)

← Bulgarian со́йка (cognate)

← Czech sojka (cognate)

← Upper Sorbian soja (cognate)

← Old East Slavic соя (derived)

← Polish soja (cognate)

← Polish sójka (mention)

← Russian со́я (affix)

← Russian -ка (affix)

← Russian сия́ть (cognate)

← Serbo-Croatian со̑јка (cognate)

← Slovak sojka (cognate)

← Ukrainian со́я (cognate)

→ Hungarian szajkó (cognate)