Belerion (, also Latinised as Belerium or Bolerium) was the southwest promontory of Great Britain as described by Pythéas in the 4th century B.C.. Pythéas' original work has not survived, however he is epitomised by the 1st century B.C. historian Diodorus and the 2nd century A.D. geographer Ptolemy. Its inhabitants, otherwise unnamed, were said to be "hospitable to strangers" because of their tinworking industry, corresponding with the modern counties of Devon and Cornwall.
Rivet and Smith (1979) suggest an etymology which associated Belerion with Belenos with the ' element of Proto-Indo-European supposedly meaning "bright, shining". However, in the Leiden Indo-European etymological dictionary series the element has the meaning "strike, pierce" in proto-Celtic and "war, warfare" in Latin and old italic.
Reference to Belerion only found in two sources from classical antiquity: the Bibliotheca Historica and the Geography. Both are secondary or tertiary sources, originally deriving from one primary source: Pytheas.
The most detailed description of Belerion is found in the Bibliotheca Historica (5.21-22), written in ancient Greek. The relevant phrase is emboldened:<blockquote>5.21.3-4 ñá½ÂÃÂ÷ óὰàÃÂá¿· ÃÂÃÂîüñÃÂù ÃÂÃÂïóÃÂýÿàÿá½ÂÃÂñ ÃÂñÃÂñÃÂû÷ÃÂïÃÂàÃÂῠãùúõûïᾳ ÃÂὰàÃÂûõàÃÂὰàÿá½Âú á¼°ÃÂÿúÃÂûÿààá¼ÂÃÂõù. ÃÂñÃÂõúÃÂõùýÿÃÂÃÂ÷àôü ñá½ÂÃÂá¿ÂàÃÂñÃÂá½° ÃÂὴý ÃÂá½ÂÃÂÃÂÃÂ÷ý ûÿþá¿ÂÃÂ, ÃÂὸ üὲý á¼ÂûìÃÂùÃÂÃÂÿý á¼ÂÃÂὸ ÃÂá¿ÂàἠÃÂõïÃÂÿàôùõÃÂÃÂ÷úὸàá¼ÂúÃÂÃÂÃÂîÃÂùÿý, ὠúñûÿῦÃÂù ÃÂìýÃÂùÿý, ÃÂñÃÂὶý á¼ÂÃÂÃÂÃÂõùý á¼ÂÃÂὸ ÃÂá¿Âàóá¿ÂàÃÂÃÂñôïÿààὡàá¼ÂúñÃÂÃÂý, úñøü á½Âý ÃÂÃÂÃÂÿý ἡ øìûñÃÂÃÂñ ÃÂÿùÃ栨ÂÃÂñù ÃÂὸý á¼ÂúÃÂÿàý, ÃÂὸ ôü á¼ÂÃÂõÃÂÿý á¼ÂúÃÂÃÂÃÂîÃÂùÿý ÃÂὸ úñûÿÃÂüõýÿý ÃÂõûÃÂÃÂùÿý á¼ÂÃÂÃÂÃÂõùý ûÃÂóõÃÂñù ÃÂá¿ÂàἠÃÂõïÃÂÿàÃÂûÿῦý ἡüõÃÂῶý ÃÂõÃÂÃÂìÃÂÃÂý, ÃÂὸ ôü á½ÂÃÂÿûõùÃÂÃÂüõýÿý á¼Âýîúõùý üὲý á¼±ÃÂÃÂÿÃÂÿῦÃÂùý õἰàÃÂὸ ÃÂÃÂûñóÿÃÂ, á½ÂýÿüìöõÃÂøñù ôü á½ÂÃÂúñý. ÃÂῶý ôὲ ÃÂûõàÃÂῶý ÃÂὴý üὲý á¼ÂûñÃÂïÃÂÃÂ÷ý õἶýñù ÃÂÃÂñôïÃÂý á¼ÂÃÂÃÂñúùÃÂÃÂùûïÃÂý ÃÂõýÃÂñúÿÃÂïÃÂý, ÃÂñÃÂîúÿàÃÂñý ÃÂñÃÂá½° ÃÂὴý ÃÂá½ÂÃÂÃÂÃÂ÷ý, ÃÂὴý ôὲ ôõàÃÂÃÂÃÂñý ÃÂὴý á¼ÂÃÂὸ ÃÂÿῦ ÃÂÿÃÂøüÿῦ ÃÂÃÂὸàÃÂὴý úÿÃÂàÃÂὴý á¼ÂýîúÿàÃÂñý ÃÂÃÂñôïÃÂý üàÃÂïÃÂý ÃÂõýÃÂñúùÃÂÃÂùûïÃÂý, ÃÂὴý ôὲ ûÿùÃÂὴý ÃÂÃÂñôïÃÂý ôùÃÂüàÃÂïÃÂý, á½¥ÃÂÃÂõ ÃÂὴý ÃÂá¾¶ÃÂñý õἶýñù ÃÂá¿ÂàýîÃÂÿàÃÂõÃÂùÃÂÿÃÂὰý ÃÂÃÂñôïÃÂý ÃÂõÃÂÃÂñúùÃÂüàÃÂïÃÂý ôùÃÂÃÂùûïÃÂý ÃÂõýÃÂñúÿÃÂïÃÂý.</blockquote><blockquote>5.22 á¼Âûûὰ ÃÂõÃÂá½¶ üὲý ÃÂῶý úñÃÂü ñá½ÂÃÂὴý ýÿüïüÃÂý úñὶ ÃÂῶý á¼ÂûûÃÂý ἰôùÃÂüìÃÂÃÂý ÃÂá½° úñÃÂá½° üÃÂÃÂÿàá¼ÂýñóÃÂìÃÂÿüõý á½ ÃÂñý á¼ÂÃÂá½¶ ÃÂὴý ÃÂñïÃÂñÃÂÿàóõýÿüÃÂý÷ý ÃÂÃÂÃÂñÃÂõïñý õἰàÃÂÃÂõÃÂÃÂñýïñý ÃÂñÃÂñóõý÷øῶüõý, ýῦý ôὲ ÃÂõÃÂá½¶ ÃÂÿῦ úñÃÂü ñá½ÂÃÂὴý ÃÂàÿüÃÂýÿàúñÃÂÃÂùÃÂÃÂÃÂÿàôùÃÂþùüõý. ÃÂá¿ÂàóὰàÃÂÃÂõÃÂÃÂñýùúá¿ÂàúñÃÂá½° ÃÂὸ á¼ÂúÃÂÃÂÃÂîÃÂùÿý ÃÂὸ úñûÿÃÂüõýÿý ÃÂõûÃÂÃÂùÿý ÿἱ úñÃÂÿùúÿῦýÃÂõàÃÂùûÃÂþõýÿï ÃÂõ ôùñÃÂõÃÂÃÂýÃÂÃÂàõἰÃÂá½¶ úñὶ ôùὰ ÃÂὴý ÃÂῶý þÃÂýÃÂý á¼ÂüÃÂÃÂÃÂÃÂý á¼ÂÃÂùüùþïñý á¼Âþ÷üõÃÂÃÂüÃÂýÿù ÃÂὰàá¼ÂóÃÂóìÃÂ. ÿá½ÂÃÂÿù ÃÂὸý úñÃÂÃÂïÃÂõÃÂÿý úñÃÂñÃÂúõàìöÿàÃÂù ÃÂùûÿÃÂÃÂÃÂýÃÂàá¼ÂÃÂóñöÃÂüõýÿù ÃÂὴý ÃÂÃÂÃÂÿàÃÂñý ñá½ÂÃÂὸý óá¿Âý.</blockquote>This was first translated into English by George Booth (1700; reprinted 1814), but C. H. Oldfather's translation of 1939 is more commonly used:<blockquote>5.21.3-4 Britain is triangular in shape, very much as is Sicily, but its sides are not equal. This island stretches obliquely along the coast of Europe, and the point where it is least distant from the mainland, we are told, is the promontory which men call Cantium, and this is about one hundred stades from the land, at the place where the sea has its outlet, whereas the second promontory, known as Belerium, is said to be a voyage of four days from the mainland, and the last, writers tell us, extends out into the open sea and is named Orca. </blockquote><blockquote>5.22 But we shall give a detailed account of the customs of Britain and of the other features which are peculiar to the island when we come to the campaign which Caesar undertook against it, and at this time we shall discuss the tin which the island produces. The inhabitants of Britain who dwell about the promontory known as Belerium are especially hospitable to strangers and have adopted a civilized manner of life because of their intercourse with merchants of other peoples. They it is who work the tin, treating the bed which bears it in an ingenious manner. </blockquote>
Belerion also appears in Ptolemy's Geography (II.3) as an alternative name for the ÃÂýÃÂùÿàÃÂÃÂÃÂñùÿý (or ÃÂûÃÂùÿàõÃÂñïÿý depending on the manuscript used) promontory. It appears in his description of the British coastline and it the islands southwesterly extreme point, e.g. Lands End:<blockquote>á¼ÂýÃÂùÿàÃÂÃÂÃÂñùÿý (á¼ÂûÃÂùÿàõÃÂÃÂñá¿Âÿý) á¼ÂúÃÂÿý ÃÂὸ úñὶ ÃÂÿûÃÂÃÂùÿý</blockquote>Translated and transliterated as: <blockquote>ÃÂntiouéstaion (ÃÂltiouestaÃÂon) or Bolérion promontory</blockquote>
Pytheas (via Diodorus) is not specific about the location of Belerion except that it was a promontory (á¼ÂúÃÂÃÂÃÂîÃÂùÿý) described in general terms in a similar way to ÃÂìýÃÂùÿý (Kent) or á½ÂÃÂúñý (northern tip of Scottish mainland, now only surviving in the toponym for Orkney), and that its inhabitants produced tin that was sailed to Ictis and transported to Massalia via continental Gaul. The only places in the British Isles that produced tin were modern counties of Devon and Cornwall. In Ptolemy's Geography Belerion is an alternative (possibly archaic) name for Lands End.