Brutus, also called Brute of Troy, is a fictional character who is depicted as a legendary descendant of the Trojan hero Aeneas, known in medieval British legend as the eponymous founder and first king of Britain. This legend first appears in the Historia Brittonum, an anonymous 9th-century historical compilation to which commentary was added by Nennius, but is best known from the account given by the 12th-century chronicler Geoffrey of Monmouth in his Historia Regum Britanniae.

In Greco-Roman mythology, Aeneas was a Trojan hero, the son of the Trojan prince Anchises and the Greek goddess Aphrodite. His father was a first cousin of King Priam of Troy, making Aeneas a second cousin to Priam's children. He is a minor character in Greek mythology and is mentioned in Homer's Iliad. Aeneas receives full treatment in Roman mythology, most extensively in Virgil's Aeneid, where he is cast as an ancestor of Romulus and Remus. He became the first true hero of Rome. Snorri Sturluson identifies him with the Norse god Víðarr of the Æsir.