Danbleys, Danebleise, Denebleise
A wealthy city in King Leodegan’s Carmelide (Cameliard), featured in the Vulgate Merlin.
It was besieged by King Rions (Ryons) and the Saxons in the early days of Arthur’s reign, but its fortifications were so strong that the defenders only had to worry about being starved out.
A combined force of Arthur, Ban, and Bors routed Rions and lifted the siege. The English Arthour and Merlin places this battle at Carhaix.
Sources
Vulgate Merlin | 1220-1235
Arthour and Merlin | Late 13th century