Ptolemy refers to Rigni and Regini, the Antonine Itinerary to a place called Regno and the Ravenna Cosmography to a Navimago Regentium, but it would appear that none of the ancient sources actually refers to a tribe called the Regni. Nonetheless, there seems no good reason to question the widespread belief that the people of the civitas centred on Chichester were called the Regni simply because they had earlier been subjects of king Cogidubnus, the kingdom being converted into a civitas of Roman Britain when the king died.