What you conceive of as a wonderful city today has a lengthy and little-known past. Some long-held hypotheses hold that London was founded by Romans around the year 50 AD. The origin of its name is likewise a mystery. London was known by several names throughout history, including Londonium, Ludenwic, and Ludenberg. The most widely accepted explanation is that the name London is derived from the old Celtic word "Londinous," which meaning "brave."