Ῥάβεννα
Could not find Ῥάβενναν in Logeion dictionaries.
Ῥάβενναν Proper-name noun: feminine accusative singular of Ῥάβεννα
Ῥάβεννα — Ravenna (Italy), Pleiades 393480
Ῥάβεννα, ης (ἡ) = lat. Ravenna, Ravenne, v. de la Gaule Cispadane, Plut. Mar. 2, etc.