Hiero I (/ˈhaɪəroʊ/; also Hieron /ˈhaɪərɒn/; Ancient Greek: Ἱέρων) was the son of Deinomenes, the brother of Gelon and tyrant of Syracuse in Sicily, from 478 to 467 BC. In succeeding Gelon, he conspired against a third brother, Polyzelos.
Hiero I (/ˈhaɪəroʊ/; also Hieron /ˈhaɪərɒn/; Ancient Greek: Ἱέρων) was the son of Deinomenes, the brother of Gelon and tyrant of Syracuse in Sicily, from 478 to 467 BC. In succeeding Gelon, he conspired against a third brother, Polyzelos.
Thrasybulus (Greek: Θρασύβουλος) was a tyrant who ruled Syracuse, Magna Graecia, for eleven months during 466 and 465 BC. He was a member of the Deinomenid family and the brother of the previous tyrant Hiero, who seized power in Syracuse by convincing Gelon's son to give up his claim to the leadership of Syracuse. A few months later, members of the Deinomenid family overthrew him. However, the Deinomenid family was subsequently overthrown and a democracy was established in Syracuse.
Onatas was an ancient Greek sculptor of the time of the Persian Wars and an exponent of the flourishing school of Aegina. Many of his works are mentioned by Pausanias; they included a Hermes carrying the ram, and a strange image of the Black Demeter made for the people of Phigalia; also some elaborate groups in bronze set up at Olympia and Delphi.
For Hiero I, king of Syracuse, Onatas executed a votive chariot in bronze dedicated at Olympia. In Delphi he was one of the sculptors who executed the Ex voto of the Tarentines.
Theron (Greek: Θήρων, gen.: Θήρωνος; died 473 BC), son of Aenesidemus, was a Greek tyrant of the town of Acragas in Sicily in Magna Graecia from 488 BC. According to Polyaenus, he came to power by using public funds allocated for the hire of private contractors meant to assist with a temple building project, to instead hire a personal group of bodyguards. With this force at his disposal, he was able to seize control of the town's government. He soon became an ally of Gelo, who at that time controlled Gela, and from 485 BC, Syracuse. Gelo later became Theron's son-in-law.
Theron went to war with the city of Selinunte and the tyrant of Himera, Terillus. His kingdom covered a big part of Western Sicily, as a numismatic distribution study has brought afore. The latter, expelled from his city, therefore sought an alliance with Carthage through his son-in-law Anaxilas, tyrant of Rhegium. Theron occupied Himera but was then besieged in this city by a Carthaginian army, assisted by Terillus. In 480 BC, Theron, with the support of Gelo, won a great victory outside the walls of Himera against the Carthaginians and their allies. During the reign of Theron, Acragas along with Syracuse and Selinunte formed a kind of "triumvirate" which dominated Greek Sicily at the time. Theron died in 473 BC and was briefly succeeded by his son Thrasydaeus, before he was defeated by Gelo's brother and successor, Hiero I. After that defeat, Acragas came under the control of Syracuse.