While they were at Naupaktos TemenosÂ’ brother Aristodemos died, struck by lightning, murdered by the sons of Pylades and Elektra, or shot by Apollo for failing to go to the oracle (since he had learned in a chance meeting with Herakles that the Herakleidai would successfully return to the Peloponnese).
In the Spartan version reported by Herodotos, however, Aristodemos did not die but participated in the conquest of the Peloponnese, became king of Sparta, and was succeeded by his twin sons Eurysthenes and Prokles.
Again the Spartans had to decide which one was older; watching Argeia closely they saw that she always washed and fed Eurysthenes first and they concluded correctly that this one must be older.
By his wife Argia 4 he became the father of the twins Eurysthenes 1 and Procles 2, who are the founders of the two royal houses of Sparta.
Eurysthenes 1 and his twin brother Procles 2 were bitter enemies, but they won by lot the kingdom of Lacedaemon.
Procles 2 and his twin brother Eurysthenes 1 were bitter enemies, but they won by lot the kingdom of Lacedaemon and decided to institute two royal houses in Lacedaemon (Sparta) [Apd.2.8.2-5; Pau.3.1.5-7, 3.7.1, 3.16.6, 4.3.4ff.; Strab.8.5.5].