Northern Kurdish xewn

← English sweven (cognate)

← Proto-Indo-Iranian *swápnas (inherited)

← Proto-Indo-European *swep- (root)

← Proto-Indo-European *swépnos (inherited)

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

← Proto-Iranian *hwáfnah (inherited)

→ Persian خواب (mention)

→ Persian خفتن (mention)