Etymology and OriginsMyrddin is the original Welsh form of the name later Anglicized as Merlin. Its etymology traces back to the Romano-British settlement of Moridunum, derived from Celtic elements *mori meaning "sea" and *dūnom meaning "rampart, hill fort". This town became known in Welsh as Caerfyrddin (caer "fort" + Myrddin), later anglicized as Carmarthen. Folk etymology misinterpreted Caerfyrddin as "fort of Myrddin", turning a place name into a personal name.Mythological and Literary FigureIn early Welsh tradition, Myrddin Wyllt (Welsh for "Myrddin the Wild") is a legendary figure and chief bard. He appears in poems from The Black Book of Carmarthen and The Red Book of Hergest, depicted as a prophet driven mad after witnessing the slaughter of his king Gwenddoleu at the Battle of Arfderydd. He then retreats to the Caledonian Forest, living as a wild man. His character likely stems from North Brythonic lore, possibly the figure Lailoken, and shares parallels with the Irish Suibhne (also known as Mad Sweeney).The Welsh Myrddin was originally unconnected to King Arthur, but in the 12th century, Geoffrey of Monmouth adapted Myrddin into Merlin, the magician of Arthurian romance. Despite Geoffrey's attempt to merge the figures, later Welsh literature distinguished them, with Myrddin retaining his prophetic, mad bard persona.Notable Bearers and Cultural LegacyThe name Myrddin is primarily historical and legendary. Its modern currency is rare, largely confined to literary contexts. Variants include the English Merlin and Merlyn. The underlying root, Moridunum, points to the Celtic origins of the name.Meaning: Ultimately from Moridunum, meaning "sea fort"Origin: Welsh, derived from a place nameType: Legendary figure nameUsage Regions: Wales, medieval Welsh literature