The Brittonic languages form one of the two branches of the Insular Celtic languages; the other is Goidelic. It comprises the extant languages Breton, Cornish, and Welsh. The name Brythonic was derived by Welsh Celticist John Rhys from the Welsh word Brython, meaning Ancient Britons as opposed to an Anglo-Saxon or Gael.
The Celtic languages are a branch of the Indo-European language family, descended from Proto-Celtic. The term "Celtic" was first used to describe this language group by Edward Lhuyd in 1707, following Paul-Yves Pezron, who made the explicit link between the Celts described by classical writers and the Welsh and Breton languages.
The Celts or Celtic peoples were a collection of Indo-European peoples in Europe and Anatolia, identified by their use of Celtic languages and other cultural similarities. Major Celtic groups included the Gauls; the Celtiberians and Gallaeci of Iberia; the Britons, Picts, and Gaels of Britain and Ireland; the Boii; and the Galatians. The interrelationships of ethnicity, language and culture in the Celtic world are unclear and debated; for example over the ways in which the Iron Age people of Britain and Ireland should be called Celts. In current scholarship, 'Celt' primarily refers to 'speakers of Celtic languages' rather than to a single ethnic group.
Lugos (Gaulish) or Lugus (Latin), also known by other names, is a god of the Celtic pantheon. His name is rarely directly attested in inscriptions, but his importance can be inferred from place names and ethnonyms and status as king of the gods. His nature and attributes are deduced from the distinctive iconography of Gallo-Roman inscriptions to Mercury, who is widely believed to have been identified with him, and from the quasi-mythological narratives involving his later cognates, Welsh Lleu Llaw Gyffes and Irish Lugh Lámhfhada.
Lusitanian mythology is the mythology of the Lusitanians, an Indo-European speaking people of western Iberia, in what was then known as Lusitania. In present times, the territory comprises the central part of Portugal and small parts of Extremadura and Salamanca.
Lepontic is an ancient Alpine Celtic language that was spoken in parts of Rhaetia and Cisalpine Gaul between 550 and 100 BC. Lepontic is attested in inscriptions found in an area centered on Lugano, Switzerland, and including the Lake Como and Lake Maggiore areas of Italy. Being a Celtic language, its name could derive from Proto-Celtic *leikwontio-.
Insular Celtic languages are the group of Celtic languages spoken in Brittany, Great Britain, Ireland, and the Isle of Man. All surviving Celtic languages are in the Insular group, including Breton, which is spoken on continental Europe in Brittany, France. The Continental Celtic languages, although once widely spoken in mainland Europe and in Anatolia, are extinct.
Celtiberian or Northeastern Hispano-Celtic is an extinct Indo-European language of the Celtic branch spoken by the Celtiberians in an area of the Iberian Peninsula between the headwaters of the Douro, Tagus, Júcar and Turia rivers and the Ebro river. This language is directly attested in nearly 200 inscriptions dated from the 2nd century BC to the 1st century AD, mainly in Celtiberian script, a direct adaptation of the northeastern Iberian script, but also in the Latin alphabet. The longest extant Celtiberian inscriptions are those on three Botorrita plaques, bronze plaques from Botorrita near Zaragoza, dating to the early 1st century BC, labeled Botorrita I, III and IV. Shorter and more fragmentary is the Novallas bronze tablet.
Lusitanian was an Indo-European Paleohispanic language. There has been support for either a connection with the ancient Italic languages or Celtic languages. It is known from only six sizeable inscriptions, dated from c. 1 CE, and numerous names of places (toponyms) and of gods (theonyms). The language was spoken in the territory inhabited by Lusitanian tribes, from the Douro to the Tagus rivers, territory that today falls in central Portugal and western Spain.
Proto-Celtic, or Common Celtic, is the hypothetical ancestral proto-language of all known Celtic languages, and a descendant of Proto-Indo-European. It is not attested in writing but has been partly reconstructed through the comparative method. Proto-Celtic is generally thought to have been spoken between 1300 and 800 BC, after which it began to split into different languages. Proto-Celtic is often associated with the Urnfield culture and particularly with the Hallstatt culture. Celtic languages share common features with Italic languages that are not found in other branches of Indo-European, suggesting the possibility of an earlier Italo-Celtic linguistic unity.
Hispano-Celtic is a term for all forms of Celtic spoken in the Iberian Peninsula before the arrival of the Romans. In particular, it includes:
The Gallaeci were a Celtic tribal complex who inhabited Gallaecia, the north-western corner of Iberia, a region roughly corresponding to what is now the Norte Region in northern Portugal, and the Spanish regions of Galicia, western Asturias and western León before and during the Roman period. They spoke a Q-Celtic language related to Northeastern Hispano-Celtic, called Gallaecian or Northwestern Hispano-Celtic. The region was annexed by the Romans in the time of Caesar Augustus during the Cantabrian Wars, a war which initiated the assimilation of the Gallaeci into Latin culture.
The languages of Portugal are Portuguese, Mirandese, Portuguese Sign Language, Leonese and Caló, with the inclusion of other linguistic entities like argots and transitional languages. Historically, Celtic and Lusitanian were spoken in what is now Portugal.
The paleo-Hispanic languages are the languages of the Pre-Roman peoples of the Iberian Peninsula, excluding languages of foreign colonies, such as Greek in Emporion and Phoenician in Qart Hadast. After the Roman conquest of Hispania the Paleohispanic languages, with the exception of Proto-Basque, were replaced by Latin, the ancestor of the modern Iberian Romance languages.
The various names used since classical times for the people known today as the Celts are of disparate origins.
The Insular Celts were speakers of the Insular Celtic languages in the British Isles and Brittany. The term is mostly used for the Celtic peoples of the isles up until the early Middle Ages, covering the British–Irish Iron Age, Roman Britain and Sub-Roman Britain. They included the Celtic Britons, the Picts, and the Gaels.
Gallaecian or Northwestern Hispano-Celtic is an extinct Celtic language of the Hispano-Celtic group. It was spoken by the Gallaeci in the northwest of the Iberian Peninsula around the start of the 1st millennium. The region became the Roman province of Gallaecia, which is now divided between the Spanish regions of Galicia, western Asturias, the west of the Province of León, and Northern Portugal.
Gaulish is an extinct Celtic language spoken in parts of Continental Europe before and during the period of the Roman Empire. In the narrow sense, Gaulish was the language of the Celts of Gaul. In a wider sense, it also comprises varieties of Celtic that were spoken across much of central Europe ("Noric"), parts of the Balkans, and Anatolia ("Galatian"), which are thought to have been closely related. The more divergent Lepontic of Northern Italy has also sometimes been subsumed under Gaulish.
