Trinobantes

Trinonantes, or Trinovantes. Inhabitants of Britain, situated next to the Cantii, northward, who occupied, according to Camden and Baxter, that country which now comprises the counties of Essex and Middlesex, and some part of Surrey. But if Ptolemy be not mistaken, their territories were not so extensive in his time, as London did not then belong to them. The name seems to be derived from the three following British words: Tri, now, hant, i. e., inhabitants of the new city (London). Enc. Lond.