Parthanan

May be a folk memory of Partholon. He is a mischevious spirit who, at the end of the harvest, would thresh any corn left standing. (Irish)

Penardun

Daughter of the Mother Goddess Don who weds Llyr. She is the mother of Bran, Branwen, and Manawydan. (Welsh)

Plur na mBan

'The Flower of Women', daughter of Oisin and the Goddess Niamh, daughter or Manannan Mac Lir. (Irish)

Pyderi

Son of Pwyll and Rhiannon and the only person to figure in all the branches of the Mabinogi. (Welsh)

Puca

A mischevious spirit who led travellers astray or performed other devilment. (Irish)