Irish suan

← Proto-Celtic *sounos (inherited)

← Proto-Indo-European *swep- (root)

← Proto-Indo-European *swépnos (inherited)

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

← Old Irish súan (inherited)

→ Irish suanbhruith (affix)

→ Irish suantraí (affix)

→ Irish suanmhar (affix)

→ Irish suanlios (affix)

→ Irish suanchógas (affix)

→ Irish suanach (affix)

→ Irish suansiúl (compound)