The name Londīnium is thought to be pre-Roman (and possibly pre-Celtic) in origin, but there is no consensus on what it means. It was common practice for Romans to adopt native names for new settlements. A common theory is that it derives from a hypothetical Celtic placename *Londinion which was probably derived from the personal name *Londinos, from the word *lond (“wild”).
Second-declension noun (neuter), with locative, singular only.
1Found in older Latin (until the Augustan Age).