Terillus

early 5th century BC) was a son of Crinippus, tyrant of Himera, in Sicily, Magna Graecia.

Terillus sought to consolidate his power as tyrant of Himera by giving his daughter Cydippe in marriage to Anaxilas, the ruler of Rhegium.

Terillus also maintained good relations with the Carthaginian general Hamilcar.

In response, the Carthaginians decided to assist Terillus' bid to be restored to power in Himera.

So the expulsion of Terillus by Theron of Acragas became the excuse for a major Carthaginian expedition under Hamilcar against the Greek cities in Sicily, which would end in a major Carthaginian defeat in the Battle of Himera in 480 BC.