Little White-Hilt
Carnwennan, Carwennan
Carwenham is the dagger or short sword of King Arthur.
It is often depicted as a concealed weapon with magical properties, such as the ability to render its user invisible or to cause darkness to fall upon the land.
He is said to have killed the Black Hag in Culhwch with Carnwennan.
Notes
Carw, in Welsh, means ‘stag’.
Source
Culhwch and Olwen | Late 11th century