Cúchulainn (also spelled Cú Chulainn) is a legendary Irish warrior hero and demigod from the Ulster Cycle of mythology. His name means "hound of Culann" in Irish, reflecting a pivotal episode in his childhood. Originally named Sétanta, he earned the epithet after he killed the fierce guard dog of the smith Culann in self-defence and offered to serve as a replacement until a new hound could be reared. The name Cúchulainn thus translates to "Culann's hound," a title that defined his heroic identity.Mythological BackgroundAccording to legend, Cúchulainn was the son of the god Lugh and the mortal Deichtine, sister of King Conchobar mac Nessa. He was trained in martial arts by the warrior woman Scáthach in Scotland, who gifted him the deadly spear Gáe Bulg. The Ulster Cycle recounts his many feats, including his single-handed defence of Ulster against the armies of Queen Medb of Connacht in the famous epic Táin Bó Cúailnge ("Cattle Raid of Cooley"). Fulfilling a prophecy, his life was short but glorious, and he died at the age of seventeen after a series of treacherous battles.Cultural SignificanceCúchulainn has become a symbol of Irish heroism and national identity. In modern times, he appears in literature, film, and video games, and his story continues to inspire adaptations. The name remains a powerful element of Irish folklore, with variant spellings such as Cú Chulainn also in use.Key FactsMeaning: "Hound of Culann"Origin: Irish mythologyType: Hero title, originally a given name for SétantaUsage: Irish, also in Scottish and Manx folklore