While the exact etymology is debated, the most common theory suggests it comes from a combination of "Llyn" meaning "lake" and "Din" meaning "fort". This would translate to "Fort on the Lake", referring to the location on the north bank of the River Thames, where a lake existed before the Romans drained it.
Other possible origins include:
* "Llyn-don" which could translate to "Fort of the Danes".
* "Lond" meaning "wild" and "Din" meaning "fort".
Regardless of the specific etymology, "Londinium" is a testament to the pre-Roman presence in the area, and the history of the city that would eventually become London.