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Devon

County of England

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Dartmoor ponies by the B3212
Neil Theasby · CC BY-SA 2.0

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The county has an area of 2,590 mi2 (6,700 km2) and had an estimated population of 1,254,506 in 2024. The south of the county is more densely populated than the north, with Plymouth in the south-west and the city of Exeter in the south-east. The seaside resorts of Torquay and Paignton are adjacent to each other in the south. The largest town in the north is Barnstaple. For local government purposes, Devon comprises a non-metropolitan county, with eight districts, and the unitary authority areas of Plymouth and Torbay. Devon County Council and Torbay Council collaborate through a combined county authority.

Devon has a varied geography. It contains Dartmoor and part of Exmoor, two upland moors that are the source of most of the county's rivers, including the Taw, Dart, and Exe. The longest river in the county is the Tamar, which forms most of the border with Cornwall and rises in Devon's northwest hills. The southeast coast is part of the Jurassic Coast World Heritage Site, and characterised by tall cliffs that reveal the Triassic, Jurassic and Cretaceous geology of the region. The county gives its name to the Devonian geologic period, which includes the slates and sandstones of the north coast. Dartmoor and Exmoor have been designated national parks, and the county also contains, in whole or in part, five national landscapes.

In the Iron Age, Roman and the Sub-Roman periods, the county was the home of the Dumnonii Celtic Britons. The Anglo-Saxon settlement of Britain resulted in the partial assimilation of Dumnonia into the kingdom of Wessex in the eighth and ninth centuries, and the western boundary with Cornwall was set at the Tamar by king Æthelstan in 936.

Toponymy

The name Devon derives from the Dumnonii, which is the name of the Brythons who inhabited the southwestern peninsula of Britain at the time of the Roman conquest of Britain. Dumnonii is thought to mean 'deep valley dwellers' from Proto-Celtic *dubnos 'deep'. In the Brittonic languages, Devon is known as Welsh: Dyfnaint, Breton: Devnent and Cornish: Dewnens, each meaning 'deep valleys'. (For an account of Celtic Dumnonia, see the separate article.) Among the most common Devon placenames is -combe, which derives from Brittonic cwm meaning 'valley' usually prefixed by the name of the possessor.

William Camden, in his 1607 edition of Britannia, described Devon as being one part of an older, wider country that once included Cornwall:

THAT region which, according to the Geographers, is the first of all Britaine, and, growing straiter still and narrower, shooteth out farthest into the West, [...] was in antient time inhabited by those Britans whom Solinus called Dumnonii, Ptolomee Damnonii [...] For their habitation all over this Countrey is somewhat low and in valleys, which manner of dwelling is called in the British tongue Dan-munith, in which sense also the Province next adjoyning in like respect is at this day named by the Britans Duffneit, that is to say, Low valleys. [...] But the Country of this nation is at this day divided into two parts, knowen by later names of Cornwall and Denshire, [...]

— William Camden, Britannia.

The term Devon is normally used for everyday purposes (e.g., "Devon County Council"), but Devonshire has continued to be used in the names of the "Devonshire and Dorset Regiment" (until 2007) and "The Devonshire Association". One erroneous theory is that the shire suffix is due to a mistake in the making of the original letters patent for the Duke of Devonshire, resident in Derbyshire. There are references to both Defnas and Defenasċīre in Anglo-Saxon texts from before 1000 CE (the former is a name for the "people of Devon" and the latter would mean 'Shire of the Devonians'), which translates to modern English as Devonshire. The term Devonshire may have originated around the 8th century, when it changed from Dumnonia (Latin) to Defenasċīr.

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