Given the task definition and input, reply with output. In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Tiberius Claudius Cogidubnus was a 1st century king of the Regnenses in early Roman Britain .

Tiberius Claudius Cogidubnus ( or Togidubnus , Togidumnus or similar , see naming difficulties ) was a 1st-century king of the Regnenses or Regni tribe in early Roman Britain .