222 BC deaths

Egyptian pharaoh

thumb|Ctesibius' water clock, as visualized by the 17th-century French architect Claude Perrault

Eucleidas () reigned Sparta from 227 BC to 222 BC. He was an Agiad, son of Leonidas II, in the place of the Eurypontid king.

Viridomarus (or Britomartus as translations vary; died 222 BC) was a Gallic military leader of the Gaesatae. In 222 BC he was hired by the Insubres who were fighting the Romans. Viridomarus led a mercenary army against a Roman army at the Battle of Clastidium. The Romans won the battle, and in the process, Marcus Claudius Marcellus, the Roman leader, earned the spolia opima by killing Viridomarus in single combat.

Chinese king of Yan state from 255 to 222 BC