Where does the word londinium stem from?

Answer 1

There is no Latin etymology for the word Londinium, the old Roman name for the city of London, so it stands to reason that it comes from the Celtic language of the first-century inhabitants of the area; the 1911 Encyclopaedia Britannica said the name was "undoubtedly Celtic". It has been linked with a Celtic personal name, Londinos, said to mean "the wild one", but scholars appear to have rejected this idea (without supplying an alternative).

Answer 2

The word "Londinium" has Latin origins and is believed to come from the word "Londin-" which may have been derived from a Celtic word meaning "wild" or "fierce." Londinium was the Roman name for the settlement that eventually became London.