Γαδαρηνός
From LSJ
ἢ λέγε τι σιγῆς κρεῖττον ἢ σιγὴν ἔχε → either say something better than silence or keep silence (Menander)
English (Abbott-Smith)
Γαδαρηνός, -ή, -όν (< Γάδαρα, Γαδαρά, Gadara, the capital of Peræa),
Gadarene, of Gadara: Mt 8:28 (Rec. Γεργεσηνῶν), Mk 5:1, Rec. (Edd., Γερασηνῶν), Lk 8:26, 37 Rec. (Edd., Γερασηνῶν).†
English (Strong)
from Gadara (a town east of the Jordan); a Gadarene or inhabitant of Gadara: Gadarene.