Celtic tribes in the British Isles

The Celtic tribes in Britain and Ireland were as follows:

The Dumnonii who occupied what are now Devon, Cornwall and Somerset.
The Iceni, who under Boudicca rebelled against the Roman rule of ancient East Anglia.
The Trinovantes and the Catuvellauni were the neighbouring tribe of the Iceni, and who joined in their rebellion.
The Ordovices who waged guerrilla warfare from the North Wales hills.
The Silures likewise resisted the Romans in present-day South Wales.
The Brigantes were an important tribe in Northern England.
The Dobunni lived in the Cotswalds and the Severn valley.
The Caledonians inhabited present-day Scotland.