thumb|right|220px|Peoples of Northern Britain according to Ptolemy's map The Epidii (Greek: Επίδιοι) were a people of ancient Britain, known from a mention of them by the geographer Ptolemy c. 150. Epidion has been identified as the island of Islay in modern Argyll. Ptolemy does not list a town for the Epidii, but the Ravenna Cosmography (RC 108.4) mentions Rauatonium, which is assumed to be Southend.
thumb|right|220px|Peoples of Northern Britain according to Ptolemy's map The Epidii (Greek: Επίδιοι) were a people of ancient Britain, known from a mention of them by the geographer Ptolemy c. 150. Epidion has been identified as the island of Islay in modern Argyll. Ptolemy does not list a town for the Epidii, but the Ravenna Cosmography (RC 108.4) mentions Rauatonium, which is assumed to be Southend.
== Etymology == The name Epidii includes the P-Celtic root epos, meaning "horse" (cf. Welsh ebol, "a foal"). The Q-Celtic equivalent would be *ekwos, which became Old Gaelic ech. It is suggested that they were named after a horse god, whose name could be reconstructed as *Epidios. The Q-Celtic equivalent would be *Ekwidios, which may be the origin of the Old Gaelic name Eochaid.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).