Sīon, ōnis (or indecl.), m., f., or n.,
a hill of Jerusalem , and, by meton., Jerusalem , Prud. Ham. 459; Vulg. Matt. 21, 5: facta est deserta Sion, id. Isa. 64, 10.
SION, M. (Σιών), originally the name of a particular fortress or hill of Jerusalem, but often in the...
Dictionary of Greek and Roman Geography