(Εὔφορβος), a son of Panthous and brother of Hyperenor, was one of the bravest among the Trojans. He was the first who wounded Patroclus, but was afterwards slain by Menelaus (Hom. Il. 16.806, 17.1_60), who subsequently dedicated the shield of Euphorbus in the temple of Hera, near Mycenae. (Paus. 2.17.3.) It is a well known story, that Pythagoras asserted that he had once been the Trojan Euphorbus, that from a Trojan he had become an Ionian, and from a warrior a philosopher. (Philostr. Vit. Apoll. 1.1, Heroic. 17; Diog. La6rt. 8.4; Ov. Met. 15.161.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890