Celtic languages
Brittonic
The term Brittonic, or sometimes Brythonic, is applied to a family of Celtic languages spoken in Britain and, by migration from there in about the fifth or sixth century, in Brittany. It includes Welsh, Cornish, Breton and (at least to c. 1000 AD) Cumbric or Northern Brittonic and probably Pictish. Within England, the distribution of Brittonic place-names (especially river-names), together with the evidence of certain linguistic changes, suggests that Brittonic survived longer in western and northern regions than further south and east. Brittonic languages belong to the so-called P-Celtic branch of Celtic, in distinction from the Q-Celtic (Gaelic or Goidelic), with name elements such as pen(n) ‘head, end’ where Gaelic has ceann/kin. The early history of Brittonic is often uncertain, given the limited nature of the evidence, but the following periods and the terms applied to them are widely accepted.
British, late BC era to c. 600 AD: The period beginning when P-Celtic had diverged from Q-Celtic. Ancient syllable structures were intact at first but radical linguistic change, including loss of final syllables, took place in the later centuries. During this period British was in use over most of the island of Britain.
Neo-Brittonic or Common Neo-Brittonic, c. 600 to c. 900: a much changed language (hence ‘Neo-‘), though as yet with little or no discernible differentiation into Welsh, Cornish and Breton.
Old Welsh, Old Cornish and Old Breton, c. 900 to c. 1100
Middle Welsh, Middle Cornish and Middle Breton, c. 1100 to c. 1500 (Welsh) or c. 1600 (Cornish and Breton)
Examples of Brittonic names: Bodmin and Penzance (Cornwall), Carlisle and Penrith (Cumberland), Dover (Kent), York; major river-names including Avon, Exe and Trent.
Several Brittonic names survive in combination with an Old English element in the names of major towns and cities such as Manchester and the county towns Dorchester, Leicester and Worcester.
Cornish
The Brittonic language spoken in Cornwall until the eighteenth century, and the language of most of the major names of Cornwall, though English and English naming spread into East Cornwall in the Anglo-Saxon period and from there gradually westwards.
Examples: Liskeard, Lizard, Looe, Penzance
Northern Brittonic or Cumbric
A Brittonic variety or group of varieties is in evidence in place-names of the’Old North’ –Brittonic-speaking parts of Northern England (especially Cumbria until about the eleventh century), and southern Scotland (notably the kingdom of Strathclyde during its heyday, the late ninth to mid eleventh century). This was termed ‘Cumbric’ in twentieth-century studies, but the use of the term varies and ‘Northern Brittonic’ is generally preferred in recent scholarship.
Examples: Glasgow, Govan, Lanark (all in Lanarkshire), Melrose (Roxburghshire); Blindcrake, Cumrew, Penrith (all in Cumberland)
Pictish
Although evidence is in short supply, Pictish appears to be a Brittonic variety spoken in eastern and northern Scotland from Fife northwards (and perhaps further west before the Viking Age). Pictish appears to have died out by the eleventh century, by which point areas where Pictish had been spoken had become Gaelic- or Norse-speaking.
Examples: Aberdeen; Aberdour and Cupar (Fife); Perth and the Pit- in names such as Pitcairn and Pitlochry (Perthshire).
Welsh
The best-surviving variety of the Brittonic languages and the language of most of the place-names of Wales (as well as some in bordering counties of England), including relatively recent ones such as Pontypridd (first recorded c. 1700).
Examples: Aberystwyth (Cardiganshire), Abertawe (= Swansea), Dolgellau (Merionethshire)
Gaelic or Goidelic (including Irish)
The form of Celtic spoken, and forming place-names, in Ireland, the Isle of Man, much of mainland Scotland and the Hebrides. It is also known as Q-Celtic, in distinction from the P-Celtic variety Brittonic or Brythonic.
Gaelic was brought to western Scotland in about the fifth century by migrants from Ireland, and spread from there during the Middle Ages. The varieties of Gaelic spoken in Ireland and accounting for most of the major names there are also termed (Old, Middle or Modern) Irish and the varieties spoken in Scotland are termed Scottish Gaelic or simply Gaelic. The variety spoken on the Isle of Man is known as Manx. Due to common linguistic ancestry, the roots of early Gaelic place-names in Scotland are sometimes designated ‘Old Irish’. Gaelic names have widely been anglicised, turning, for instance, baile ‘homestead, township’ into bally/balli and srath ‘valley, riverside land’ into strath in Irish and Scottish place-names.
Examples in Scotland: Auchencairn (Dumfriesshire and Kirkcudbrightshire), Benbrack (Dumfriesshire), Kilbride (several);
In Ireland: Belfast/Béal Feirste, Benbrack/Beann Breac (Cavan), Dublin (Dubh Linn, though the Irish name currently used is Baile Átha Cliath), Kildare/Cill Dara;
In Isle of Man: Douglas; in England: Ravenglass (Cumberland).