In Greek mythology, Teucer, also Teucrus, Teucros or Teucris, was the son of King Telamon of Salamis Island and his second wife Hesione, daughter of King Laomedon of Troy. He fought alongside his half-brother, Ajax, in the Trojan War and is the legendary founder of the city of Salamis on Cyprus. Through his mother, Teucer was the nephew of King Priam of Troy and the cousin of Hector and Paris—all of whom he fought against in the Trojan War.

In Greek mythology, Telamon was the son of King Aeacus of Aegina, and Endeïs, a mountain nymph. The elder brother of Peleus, Telamon sailed alongside Jason as one of his Argonauts, and was present at the hunt for the Calydonian Boar. In the Iliad, he was the father of Greek heroes Ajax the Great and Teucer by different mothers. Some accounts mention a third son of his, Trambelus. He and Peleus were also close friends of Heracles, assisting him on his expeditions against the Amazons and his assault on Troy.