Deucaledonicus Oceanus
Δουηκαλεδόνιος Ὠκεανός
Deucaledonicus Oceanus (Δουηκαλεδόνιος Ὠκεανός), the name given by Ptolemy to the ocean on the north of the Britannic Islands. The table
of the British Isles is bounded on the north by that
ocean which is called Hyperborean or Deucaledonian
(8.3.2). The word occurs again in Marcianus Heracleota, whose text, for these parts at least, is but an abridgment of Ptolemy's. In another part of his work, this latter calls it Deucaledonian or Sarmatic.
[DICALEDONAE; PICTI.]
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.