Rhiannon is connected to three mystical birds. The Birds of Rhiannon (Adar Rhiannon) appear in the Second Branch, in the Triads of Britain, and in Culhwch ac Olwen. In the latter, the giant Ysbaddaden demands them as part of the bride price of his daughter. They are described as "they that wake the dead and lull the living to sleep." This possibly suggests Rhiannon is based on an earlier goddess of Celtic polytheism.
Rhiannon is connected to three mystical birds. The Birds of Rhiannon (Adar Rhiannon) appear in the Second Branch, in the Triads of Britain and in Culhwch ac Olwen. In the latter, the giant Ysbaddaden demands them as part of the bride price of his daughter. They are described as "they that wake the dead and lull the living to sleep." This possibly suggests Rhiannon is based on an earlier goddess of Celtic polytheism.