Jepson simply says an ancient Greek name. The Botanary website says “Named for Teucer, a Trojan king who used the plant as a medicine; or possibly for Dr. Teucer, a botanist and physician.” Stearns‘ Dictionary of Plant Names says: “Possibly named for Teucer, first king of Troy.” The Columbia Encyclopedia gives two alternate meanings: “1 Ancestor and king of the Trojans, who are also called the Teucri. He was the father-in-law of Dardanus. 2 Son of Telamon and Hesione. He was the greatest archer in the Trojan War” Umberto Quattrocchi states: “From the Greek teukrion, possibly for Teucer (Teukros), the founder of the town of Salamis in Cyprus.” Encyclopedia Mythica says: “Teucer was the son of the river Scamander and the nymph Idaea, and was the legendary ancestor of the Trojans; hence the Trojans are often called ‘Teucrians.’ He should not be confused with the Teucer who was the son of Telamon and the brother of Ajax, and who fought against Troy during the Trojan War.” And Wikipedia states that Teucer was “The son of Hesione and Telamon, Teucer fought with his half-brother, Ajax the Great, in the Trojan War and is the legendary founder of the city Salamis on Cyprus.” It appears that there were two separate figures, Teucrus, who was the ancestor of the Trojans, and the Greek Teucer who fought in the Trojan War and founded Salamis
