Abbott-Smith Manual Greek Lexicon
Πέργαμος (G4010)
2 Πέργαμος , -ου, ἡ (so Xen., Paus., al., but -ον, τό in Strabo, Polyb., and most writers, also in Inscr.; in NT the termination is uncertain), Pergamum , a city of Mysia: Re 1:11 2:12 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain