(Berkshire) is where the legend says St. George killed the dragon. A bare place is shown on the hill, where nothing will grow, and there the blood of the dragon ran out.
In Saxon annals we are told that Cedric, founder of the West Saxon kingdom, slew there Naud, the pendragon, with 5,000 men. This Naud is called Natan-leod, a corruption of Naudan ludh (Naud, the people's refuge).
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Dragon's Hill from Infoplease: