Polish dęga

← Czech duha (cognate)

← Proto-Indo-European *dʰongʰ-eh₂ (mention)

← Proto-Indo-European *dʰengʰ- (mention)

← Lithuanian dangà (cognate)

← Russian дуга́ (cognate)

← Serbo-Croatian ду́га (cognate)

← Slovak dúha (cognate)

← Proto-Slavic *dǫga (inherited)