Welsh demigod son of Rhiannon (scholarly-consensus Brittonic horse-goddess, *Rīgantonā / Welsh manifestation of Gaulish Epona) by the mortal Pwyll, prince of Dyfed; central figure of the Mabinogion First through Fourth Branches. Birth-name unknown; abducted from his cradle the night of his birth by a black-clawed monstrous apparition while his nursemaids slept; raised by Teyrnon Twrf Liant of Gwent Ys-coed under the name Gwri Wallt Euryn ("Gwri of the Golden Hair") until age 4, when his resemblance to Pwyll was recognized and he was returned to Arberth — at which point Rhiannon's seven-year horse-block punishment ended and she renamed him Pryderi ("anxiety, care"). Inherited Dyfed after Pwyll's death. Married Cigfa, daughter of Gwynn Gohoyw. One of the seven survivors of the catastrophic Welsh expedition to Ireland under Bran the Blessed to rescue Branwen from Matholwch. Survived the Desolation of Dyfed enchantment in the Third Branch (trapped with his mother in an enchanted golden caer for years until Manawydan negotiated their release). Killed in single combat by Gwydion fab Dôn in the Fourth Branch's opening cattle-of-Annwn war over pigs Pryderi had received from Arawn. Per Anwyl 1906 and Mackillop 2004, Pryderi and his mother are often iconographically depicted as foal-and-mare, encoding Rhiannon's horse-goddess identity through the offspring; the structural parallel of Pryderi's abduction with Teyrnon's May-Eve foal-thefts on the same night is the textual signal of this iconography. The MacCullogh 1911 substrate reading proposes Pryderi as the surviving Welsh trace of a Brittonic dying-and-reborn-god mythologem (parallel to figures like Mabon ap Modron and the Roman Cernunnos) with Manawydan + Rhiannon as the original divine-pair parents — the registry records the textual Pwyll-paternity reading as primary with the substrate-reading as scholarly footnote.