Mark 5:1-21

Decapolis : a large region south of the Sea of Galilee mainly east of the Jordan
(33° 31´, 36° 18´)

Gadarene : an inhabitant of the region around the town of Gadara, some 10 km SE of the Sea of Galilee (IBD)

Gerasene : the inhabitants of the town (and region) of Gadara/Gerasa