Hyperanthes was a son of Darius the Great of Persia and brother to Xerxes I. He was present in the second invasion of Greece in 480 BC. According to Herodotus

Herodotus

Herodotus was an ancient Greek historian who was born in Halicarnassus, Caria and lived in the 5th century BC . He has been called the "Father of History", and was the first historian known to collect his materials systematically, test their accuracy to a certain extent and arrange them in a...

, he fought and died alongside his other brother Abrocomes

Abrocomes

Abrocomes was a son of king Darius I of Persia and his wife Phratagune, who died with his full brother Hyperanthes in the battle of Thermopylae, while fighting over the body of Leonidas.-Other sources:* at Project Gutenburg...

 in the battle of Thermopylae

Battle of Thermopylae

The Battle of Thermopylae was fought between an alliance of Greek city-states, led by King Leonidas of Sparta, and the Persian Empire of Xerxes I over the course of three days, during the second Persian invasion of Greece. It took place simultaneously with the naval battle at Artemisium, in August...

 in the final phase known as the "Battle of Champions" (Tom Holland), where the Sparta

Sparta

Sparta or Lacedaemon, was a prominent city-state in ancient Greece, situated on the banks of the River Eurotas in Laconia, in south-eastern Peloponnese. It emerged as a political entity around the 10th century BC, when the invading Dorians subjugated the local, non-Dorian population. From c...

ns in their last stand fought feverishly against him and the Persian force over the retrieval of Leonidas' dead body.