Agis I

He was possibly the first historical king of Sparta, reigning at the end of the tenth century BC, during the emergence of the Dorians in Laconia.

[1][2][3] However, Eurysthenes was certainly invented in order to extend the length of Spartan rule to the fall of the Mycenean civilisation—some time after 1200—while there was in fact a gap of more than two centuries before the arrival of the Dorians in Laconia.

[6] Modern scholars have aimed to correct these rewritings and instead make Agis the real founder of the Agiad dynasty.

[13] This view is found in the writings of Pindar, Herodotus, Ephorus—the main source of the events, Plato and Isocrates.

[17] Mait Kõiv thinks instead that Pausanias' description of an 8th century conquest of Laconia by Sparta makes more sense historically and is better backed by archaeological evidence.