Thearides () was a Syracusan from

Magna Graecia Magna Graecia refers to the Greek-speaking areas of southern Italy, encompassing the modern Regions of Italy, Italian regions of Calabria, Apulia, Basilicata, Campania, and Sicily. These regions were Greek colonisation, extensively settled by G ...

, son of Hermocrates and brother of the Syracusan tyrant

Dionysius I of Syracuse Dionysius I or Dionysius the Elder ( 432 – 367 BC) was a Greek tyrant of Syracuse, Sicily. He conquered several cities in Sicily and southern Italy, opposed Carthage's influence in Sicily and made Syracuse the most powerful of the Western ...

. He is first mentioned in 390 BCE, when he was appointed by Dionysius to succeed his brother

Leptines of Syracuse Leptines (; died 375 BC) was a military leader from Syracuse, Sicily, Magna Graecia, active during his brother, Dionysius the Elder's wars. He showed bravery in the fights against Carthage and mercy with the Thurians. Biography Leptines was a bro ...

in the command of the fleet. The next year he commanded an expedition to the

Aeolian Islands The Aeolian Islands ( ; ; ), sometimes referred to as the Lipari Islands or Lipari group ( , ) after their largest island, are a volcanic archipelago in the Tyrrhenian Sea north of Sicily, said to be named after Aeolus, the mythical ruler of ...

, where he captured ten ships belonging to the Rhegians. Again in 388 BCE he was chosen by his brother to conduct the procession which Dionysius sent to the Olympic festival.

Diodorus Siculus Diodorus Siculus or Diodorus of Sicily (; 1st century BC) was an ancient Greece, ancient Greek historian from Sicily. He is known for writing the monumental Universal history (genre), universal history ''Bibliotheca historica'', in forty ...

, ''

Bibliotheca historica ''Bibliotheca historica'' (, ) is a work of Universal history (genre), universal history by Diodorus Siculus. It consisted of forty books, which were divided into three sections. The first six books are geographical in theme, and describe the h ...

'' xiv 102, 103, 109

Notes

4th-century BC Syracusans Ancient Greek admirals {{AncientGreece-bio-stub