London story
The etymology of London remains a mystery. The earliest etymological explanation can be attributed to Geoffrey of Monmouth in Historia Regum Britanniae. The name is described as originating from King Lud, who had allegedly taken over the city and named it Kaerlud. This was slurred into Kaerludein and finally London.
Many other theories have been advanced over the centuries, most of them deriving the name from Welsh or British, and occasionally from Anglo-Saxon. It is also believed the name "London" comes from the celtic word "Lyndon," which means "shadowy waters," referring to the Thames River.