Afaon, also known as Addaon, Affaon, and by other spellings, is the son of Taliesin the bard. He appears in Welsh sources, including The Dream of Rhonabwy and the Welsh Triads.
According to The Dream of Rhonabwy, Afaon was one of Arthur’s chief counselors at the Battle of Badon. Though he recklessly rode past the king, splashing him with water, he is still considered one of the wisest and most accomplished men in Britain.
In Triad 7, he is referred to as one of the "Three Bull-Chieftains of the Island of Britain". The other Bull-Chieftains are also bards’ sons. He is one of Triad 25’s "Three Battle-Rulers of the Island of Britain". According to Triad 33, his death was one of "Three Unfortunate Slaughters of the Island of Britain". His killer is variously named as Llawgat Trwm Bargod Eidyn (Heavy Battle-Hand of the Border of Eidyn) or Llongad Grwm Fargod Eidyn (Llongad the Bent of the Border of Eidyn).
According to Enlyngion y Clyweit, a collection of proverbs, he coined the expression, “The cheek will not conceal the anguish of the heart”.
Though his father is universally given as Taliesin, his mother is never specified.