In Greek mythology, Eudoros (Εὔδωρος), or Eudorus, was the son of Hermes and the second of Achilles's five commanders at the Trojan War. According to the Iliad, he commanded ten penteconters and five hundred Myrmidons. In Book XVI of the Iliad, when Patroclus readies Achilles's men, Homer talks about him for fourteen lines - more than any of the other commanders in this passage. He is also the second most notable of the five, beaten only by Phoenix.
Eudoros was the son of Hermes and Polymele, who danced in Artemis's choir. Polymele's father Phylas brought him up after she married Echekles. Eudoros was very fast, and a good fighter. 
Eudoros appears as Eudorus in the 2004 film Troy. Here, he is played by Vincent Regan. He is the second in command of Achilles's fifty Myrmidons (rather fewer than the 2,500 Myrmidons in the Iliad). He is Achilles's oldest friend, and partly takes the role of Phoenix as simultaneously Achilles's respectful mentor and follower. When the Greeks first arrive at Troy, Achilles and Eudorus storm the beach together, along with the fifty other Myrmidons. He captures Briseis and delivers her to Achilles. He is present when Patroclus is killed by Hector, and brings the news to Achilles. Achilles strikes him to the ground; he later apologises and asks Eudorus to leave him at Troy and take the Myrmidons home.