Finnish akkuna

← Estonian aken (cognate)

← Proto-Indo-European *h₃ekʷ- (root)

← Old East Slavic окъно (borrowed)

← Russian окно (cognate)

← Proto-Slavic *okъno (derived)

← Udmurt укно (cognate)

→ Estonian aken (mention)

→ Finnish ikkuna (mention)

→ Udmurt укно (cognate)