Lists of the kings of Sparta have come down to us from various ancient writers.
For the dating of the royal house of the Agiads from Eurysthenes to Polydoros, the numbers from the Excerpta Latina Barbari were used. The last king is not called Polydoros, but Automedus. For the list of the royal house of the Eurypontids from Prokles to Theopompus, the information from Diodor and Eusebius of Caesarea was used. For the subsequent period (7th / 6th centuries BC) Herodotus and Pausanias have different lists, which are mutually exclusive. In 2019, a list of kings for this period was discovered on a papyrus from Herculaneum , which is based on the otherwise unspecified list of Pherecytes of Athens and thus represents the oldest, probably also the most plausible list of the Eurypontid kings for these centuries.
After Nabis' death there were power struggles and anarchic conditions. The Spartans chose 192 BC. A laconikos to their king to alleviate the situation, which did not succeed until the admission into the Roman Empire. Nothing is known of the reign of Laconikos.
John Carr: Sparta's Kings, Barnsley 2012.
Georg Dum: The Spartan King Lists. Wagner, Innsbruck 1878.