Galicians (, ) are a Romance ethnic group from Spain that is closely related to the Portuguese people and has its historic homeland is Galicia, in the north-west of the Iberian Peninsula. Two Romance languages are widely spoken and official in Galicia: the native Galician and Spanish. Etymology The ethnonym of the Galicians (galegos) derives directly from the Latin Gallaeci or Callaeci, itself an adaptation of the name of a local Celtic tribe known to the Greeks as Καλλαϊκoί (Kallaikoí). They lived in what is now Galicia and northern Portugal and were defeated by the Roman General Decimus Junius Brutus Callaicus in the 2nd century BCE and later conquered by Augustus. The Romans later applied that name to all the people who shared the same culture and language in the north-west, from the Douro River valley in the south to the Cantabrian Sea in the north and west to the Navia River. That encompassed such tribes as the Celtici, the Artabri, the Lemavi and the Albiones. The oldest known inscription referring to the Gallaeci (reading Ἔθνο[υς] Καλλαικῶ[ν], "people of the Gallaeci") was found in 1981 in the Sebasteion of Aphrodisias, Turkey; a triumphal monument to Roman Emperor Augustus mentions them among other 15 nations that he conquered. The etymology of the name has been studied since the 7th century by authors such as Isidore of Seville, who wrote, "Galicians are called so because of their fair skin, as the Gauls" and related the name to the Greek word for "milk," γάλα (gála). However, modern scholars like J.J. Moralejo and Carlos Búa have derived the name of the ancient Callaeci either from Proto-Indo-European *kl̥(H)‑n‑ 'hill', through a local relational suffix -aik-, also attested in Celtiberian language and so meaning 'the highlanders'; or either from Proto-Celtic *kallī- 'forest' and so means 'the forest (people)'. Another recent proposal comes from the linguist Francesco Benozzo, who is not specialized in Celtic languages and identified the root gall- / kall- in a number of Celtic words with the meaning "stone" or "rock", as follows: gall (old Irish), gal (Middle Welsh), gailleichan (Scottish Gaelic), galagh (Manx) and gall (Gaulish). Hence, Benozzo explains the name Callaecia and its ethnonym Callaeci as being "the stone people" or "the people of the stone" ("those who work with stones"), in reference to the ancient megaliths and stone formations that are so common in Galicia and Portugal. Specialists of the Celtic