The inhabitants of Gadara, in Revised Version "Gerasenes" (Mark 5:1; Luke 8:26, 37). In Matt. 8:28 they are called Gergesenes, Revised Version "Gadarenes."
men of Gadara, i.e., a place surrounded or walled ...
Hitchcock's Bible Names Dictionary
(These three names are used indiscriminately to designate the place where Jesus healed two demoniacs...
William Smith's Bible Dictionary