A little mythology at the end
The region was named after Pyrrha, the daughter of Pandora and wife of Deukalion. In Greek mythology Deukalion has the same role as Noah. He was asked by his father Prometheus to build an ark to save himself and his wife from the great flood that Zeus had summoned to destroy mankind. Pyrrha and Deukalion were the only ones who survived the catastrophe and created mankind anew by throwing stones over their shoulders, from which humans were then created.