Prothous, a son of Tenthredon, commander of the Magnetes

Magnetes

The Magnetes were an ancient Greek tribe living in Thessalian Magnesia who took part in the Trojan War. They later also contributed to the Greek colonisation by founding two prosperous cities in Western Anatolia, Magnesia on the Maeander and Magnesia ad Sipylum.According to Hesiod's "Eoiae" or...

 who dwelt arount mount Pelion

Pelion

Pelion or Pelium is a mountain at the southeastern part of Thessaly in central Greece, forming a hook-like peninsula between the Pagasetic Gulf and the Aegean Sea...

 and the river Peneus, was one of the Greek heroes in the Trojan War

Trojan War

In Greek mythology, the Trojan War was waged against the city of Troy by the Achaeans after Paris of Troy took Helen from her husband Menelaus, the king of Sparta. The war is among the most important events in Greek mythology and was narrated in many works of Greek literature, including the Iliad...

 (Iliad

Iliad

The Iliad is an epic poem in dactylic hexameters, traditionally attributed to Homer. Set during the Trojan War, the ten-year siege of the city of Troy by a coalition of Greek states, it tells of the battles and events during the weeks of a quarrel between King Agamemnon and the warrior Achilles...

 ii. 758.)

There are three other mythical personages of this name, one a son of Aetolian Agrius

Agrius

Agrius or Agrios , in Greek mythology, is a name that may refer to:*A son of Parthaon, king of Calydon in Aetolia, and Euryte; he was the brother of Oeneus , Alcathous, Melas, Leucopeus, and Sterope. He was father of six sons, including Melanippus and Thersites, who overthrew Oeneus and gave the...

 (Apollod. i. 8. § 6), the second a son of Lycaon of Arcadia (iii. 8. § 1), and a third a son of Thestius

Thestius

In Greek mythology, Thestius was the son of either Ares and Demonice, or Agenor and Epicasta. He was the father of Iphicles with Leucippe, or Deidameia, daughter of Perieres, or else with Eurythemis, daughter of Cleoboea and mother of his other children, Althaea, Eurypylus, Evippus, Hypermnestra,...

 and brother of Althaea. (Paθs, viii. 45. § 5, who calls him Πρόθους instead of Πρόθοος)