Gerenia (Ancient Greek: Γερηνία), or Gerena (τὰ Γέρηνα), or Gerenus or Gerenos (Γέρηνος), was a town of ancient Messenia, where, according to Greek mythology, Nestor was said to have been brought up after the destruction of Pylos, and whence he derived the surname Gerenian, which occurs so frequently in the Iliad of Homer. There is, however, no town of this name mentioned in Homer, and many of the ancient critics identified the later Gerenia with the Homeric Enope.