Megapenthes of Sparta was Iphiloche or Echemela. At the death of their father, Megapenthes and his brother or half-brother Nicostratus together seized the throne of Sparta and drove Helen out. They were depicted on the throne in Amyclae riding the same horse. Megapenthes of Sparta In Greek mythology, Megapenthes (; Ancient Greek: Μεγαπένθης "Megapénthēs"), a Spartan prince and son of Menelaus, who ruled after his father's death and sent his mother (or step-mother) Helen into exile. In some legends, Helen was his mother; in most, however, he was Menelaus's son by a concubine, Pieris or Tereis, and was born during the Trojan War.
Gorgo, Queen of Sparta one son by Leonidas I, Pleistarchus, co-King of Sparta from 480 BC to his death in 458 BC. Her son was a minor at his father's death, so his uncle Cleombrotus (died 480 BC) and then his first cousin and heir Pausanias (r. 480-479 BC) acted as his regent. It was Pausanias who was the architect of the combined Greek victory at the Battle of Plataea (479 BC). After Pausanias fell into disfavor and was accused of plotting treason, Leonidas's son Pleistarchus ruled with the other king of Sparta, Leotychidas II (and then his grandson Archidamus) until his death 459/458