The modern Brittonic languages are generally considered to all derive from a common ancestral language termed
Brittonic,
British,
Common Brittonic,
Old Brittonic or
Proto-Brittonic, which is thought to have developed from Proto-Celtic or early Insular Celtic by the 6th century BC. A major
archaeogenetics study uncovered a migration into southern Britain in the
middle to late Bronze Age, during the 500-year period 1,300–800 BC. The newcomers were genetically most similar to ancient individuals from
Gaul. but not northern Britain. Brittonic languages were probably spoken before the Roman invasion throughout most of
Great Britain. It might have been spoken on the
Isle of Man, although by the early Middle Ages it had a Goidelic language,
Manx. During the period of the Roman occupation of what is now
England and
Wales (AD 43 to ), Common Brittonic borrowed a large stock of
Latin words, both for concepts unfamiliar in the pre-urban society of Celtic Britain such as urbanization and new tactics of warfare, as well as for rather more mundane words which displaced native terms (most notably, the word for 'fish' in all the Brittonic languages derives from the Latin rather than the native – which may survive, however, in the Welsh name of the
River Usk, ). Approximately 800 of these Latin loan-words have survived in the three modern Brittonic languages. Pictish might have resisted Latin influence to a greater extent than Brittonic languages, potentially splitting from Common Brythonic because of resistance, if wasn't separate from Brythonic before. It is probable that at the start of the Post-Roman period, Common Brittonic was differentiated into at least two major dialect groups – Southwestern and Western. (Additional dialects have also been posited, but have left little or no evidence, such as an Eastern Brittonic spoken in what is now the
East of England.) Between the end of the Roman occupation and the mid-6th century, the two dialects began to diverge into recognizably separate varieties, the Western into Cumbric and Welsh, and the Southwestern into Cornish and its closely related sister language Breton, which was carried to continental
Armorica. Jackson showed that a few of the dialect distinctions between West and Southwest Brittonic go back a long way. New divergencies began around AD 500 but other changes that were shared occurred in the 6th century. Other common changes occurred in the 7th century onward and are possibly due to inherent tendencies. Thus the concept of a Common Brittonic language ends by AD 600. Substantial numbers of Britons certainly remained in the expanding area controlled by
Anglo-Saxons, but over the fifth and sixth centuries they mostly adopted the
Old English language and culture.
Decline The Brittonic languages spoken in what are now
Scotland and
England began to be displaced in the 5th century through the settlement of Irish-speaking
Gaels and
Germanic peoples.
Henry of Huntingdon wrote that Pictish was "no longer spoken", despite Pictish names appearing up to 14th century. The
displacement of the languages of Brittonic descent was probably complete in all of Britain except
Cornwall,
Wales, and the English counties bordering these areas such as
Devon, by the 11th century. Western
Herefordshire continued to speak Welsh until the late nineteenth century, and isolated pockets of
Shropshire speak Welsh today.
Sound changes The large array of Brittonic sound changes has been documented by Schrijver (1995), building upon Jackson (1953).
Changes to long vowels and diphthongs Brittonic has undergone an extensive remodeling of Proto-Celtic diphthongs and long vowels. All original Proto-Celtic diphthongs turned into monophthongs, albeit a number of these re-diphthongized at later stages.
Changes to short vowels The distribution of Proto-Celtic short vowels were reshuffled by various processes in Brittonic, such as the two i-affections, a-affection, raisings, and contact with lenited consonants like
*g > and
*s >
*h. The default outcomes of stressed short vowels in Brittonic are as follows:
Raisings of *e and *o Welsh exhibits raisings of
*e to
*i > '
> ' and
*o > before a nasal followed by a stop. It is difficult to determine whether the raising from
*o to
*u also affected Cornish and Breton, since both of those languages generally merge
*o with
*u. The raising of
*e to
*i occurred in all three major Brittonic languages: • Proto-Celtic
*sentus "path" >
*hɪnt > Middle Welsh
hynt, Middle Cornish
hyns, and Old Breton
scoiu-hint "side-passage". Other raising environments identified by Schrijver include: • When the vowel is preceded by
*m and followed by
*n. • When the vowel is in a pretonic syllable, preceded by an alveolar consonant and followed by a nasal. • When the vowel is followed by an
*r which in turn is followed by either
*n or a velar consonant. This raising preceded a-affection, since a-affection reverses this raising whenever it applied. All these raisings not only affected native vocabulary, but also affected Latin loanwords.
Interactions of vowels followed by *g Multiple special interactions of vowels occurred when followed by
*g. •
*e in such environments can be raised to
*ɪ or lowered to
*a depending on the following sound. •
*ig >
*ɪɣ had a special Welsh development in which it would become
e in any environment where internal i-affection would apply. This development affected not only
*ig >
*ɪɣ, but also
*eg >
*ɪɣ. • The
-a- in Welsh
Cymraeg "Welsh language" and
Cymraes "Welshwoman" (both from a base
*kom-mrog-) has been explained from a special development of
*-og- to
*-ag- pre-apocope antepenultimate syllables.
Assimilation of *oRa to *aRa Closely paralleling the common Celtic change of
*eRa >
*aRa (Joseph's rule) is the change of
*oRa to
*aRa in Brittonic, with
R standing for any lone
sonorant. Unlike Joseph's rule,
*oRa to
*aRa did not occur in Goidelic. Schrijver demonstrates this rule with the following examples: • Proto-Celtic
*kolanV- "corpse": Welsh
celain, plural
calanedd vs. Irish
colainn • Proto-Celtic
*toranos "thunder":
taran in all three Brittonic languages vs. Irish
torann Assuming that Welsh
manach (borrowed from Latin
monachus "monk") also underwent this assimilation, Schrijver concludes that this change must predate the raising of vowels in
*mVn- sequences, which in turn predates a-affection (an early fifth-century process).
/je/ > /ja/ In Brittonic, Celtic
*ye generally became /ja/. Some examples cited by Schrijver include: • Proto-Celtic
*yegis > Brittonic
*jaɣ > Welsh
iâ "ice" vs. Old Irish
aig, genitive
ega (the
a in the Irish word arose via an unrelated development involving
*g) • Proto-Celtic
*yestu "boiling" > Brittonic
*jas > Welsh
ias vs. early Irish
ess "cataract" • Proto-Celtic
*gyemos "winter" > Brittonic ''
> Welsh gaeaf
vs. Irish gaim, gem
(-a-'' analogical)
*wo The sequence
*wo was quite volatile in Brittonic. It originally manifested as
*wo in unlenited position and
*wa in lenited position. Word-initially, this allomorphy was gone in medieval times, leveled out in various ways. Whichever of
*o or
*a to be generalized in the reflexes of a word in a given Brittonic language is completely unpredictable, and occasionally both
o and
a reflexes have been attested within the same language.
Southwest Brittonic languages like Breton and Cornish usually generalize the same variant of
*wo in a given word while Welsh tends to have its own distribution of variants. The distribution of
*wo/wa is also complicated by an Old Breton development where
*wo that had not turned to
*gwa would split into
go(u)- (Old Breton
gu-) in penultimate post-apocope syllables and
go- in monosyllables.
Developments of *ub The sequence
*ub >
*uβ remained as such when followed by a consonant, for instance in Proto-Celtic
*dubros "water" >
*duβr > Welsh
dwfr,
dŵr and Breton
dour. However, if no consonant exists after a
*ub sequence, the
*u merges with whatever Proto-Celtic
*ou and
*oi became, the result of which is written in the Brittonic languages. The lenited
*b >
*β is lost word-finally after this happens. •
*dubus "black" > Welsh
du, Cornish
du, Breton
du •
*lubV- "herb" > Old Breton
tutlub,
tutlob > Breton
tule,
tulo • Latin
cubitus > Middle Welsh
kufyt, modern Welsh
cufydd Schrijver dates this development between the 6th to 8th centuries, with subsequent loss of
*β datable to the 9th century.
a-affection In Brittonic, final a-affection was triggered by final-syllable
*ā or
*a, which was later apocopated. This process lowered
*i and
*u in the preceding syllable to
*e and
*o, respectively. A-affection, by affecting feminine forms of adjectives and not their masculine counterparts, created root vowel alternations by gender such as
*windos, feminine
*windā >
*gwɪnn, feminine
*gwenn > Welsh
gwyn, feminine
gwen.
i-affection There were two separate processes of i-affection in Brittonic, both causing fronting of vowels:
final i-affection and
internal i-affection.
Final i-affection occurred when the penultimate short vowels
*a,
*e,
*o,
*u were followed by Proto-Celtic
*i,
*ī, and
*ū in the very last syllable. The results are slightly different in three languages.
Simplified summary of consonantal outcomes The regular
consonantal
sound changes from Proto-Celtic to Welsh, Cornish, and Breton are summarised in the following table. Where the graphemes have a different value from the corresponding IPA symbols, the IPA equivalent is indicated between slashes. V represents a vowel; C represents a consonant. ==Remnants in England and Scotland==