Some of the known Celtic tribes in Britain and Ireland were as follows:

• The Atrebates were an important tribe in Southern England.
• The Belgae settled various places in eastern and southern England.
• The Brigantes were an important tribe in northern England and the south-east corner of Ireland.
• The Caereni who inhabited the far western Highlands.
• The Caledones lived along the Great Glen.
• The Cantiaci lived in the area of present-day Kent and give the county its name.
• The Carnonacae lived in the western Highlands.
• The Coritani also called Corieltauvi inhabited the east midlands and Leicester.
• The Cornovii who inhabited the very north tip of Britain.
• The Darini lived in northern Ireland and the western portion of Scotland, these became known as Scotti.
• The Dobunni lived in the Cotswolds and the Severn valley.
• The Dumnonii (also Damnonii) occupied what are now Devon, Cornwall, Somerset, Strathclyde, and Connacht.
• The Durotriges inhabited Dorset and south Wiltshire.
• The Epidii lived in Kintyre and on the islands in that area.
• The Iceni, who under Boudica rebelled against the Roman rule of ancient East Anglia.
• The Iverni who lived in the County Cork area and gave their name to Ireland
• The Manapii lived south of what is now known as Dublin, gave their name to Fermanagh and cognate with the Manapia from the Isle of Man.
• The Novantes of the west and coastal area of Dumfries and Galloway.
• The Ordovices who waged guerrilla warfare from the north Wales hills.
• The Parisii settled east Yorkshire and Humberside.
• The Regnenses of Hampshire.
• The Selgovae who inhabited the north of Dumfries and Galloway.
• The Silures likewise resisted the Romans in present-day south Wales.
• The Smertae inhabited the very sourthern coast of Sutherland.
• The Taexali lived in Grampian.
• The Trinovantes and the Catuvellauni were tribes neighbouring the Iceni, and who joined in their rebellion.
• The Uluti (also known as Volunti) in the north-east of Ireland and Lancashire who gave their name to Ulster.
• The Vacomagi lived in and around the Cairngorms.
• The Venicones who lived in Fife and south-east Tayside in Scotland.
• The Votadini lived in north-east England and south-east Scotland and later formed Gododdin.

Ancient Britons