Geryon
Γηρυών
A giant who herded red cattle at the western edge of the world.
He is depicted as splitting into three from the waist up, or as three bodies joined into one.
Heracles' tenth labor was to drive off his herd of cattle.
On the road of that labor, Heracles set up the "Pillars of Heracles" flanking the Strait of Gibraltar.
SourcesHesiod, Theogony