Belisama
Belisama (Aestuarium), in Britain, mentioned by Ptolemy (2.3.2) as south of Morecambe (Morecame Bay), and, consequently, most probably the mouth of the Ribble, though Horsley identifies it with that of the Mersey.
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.