Sarnia
Sarnia or SARMIA, is named in the Maritime Itin. among the islands of the Ocean between Gallia and Britannia. Supposed to be Guernsey.
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.