In Greek mythology, king Teucrus was said to have been the son of the river Scamander and of the nymph Idaea. Before the arrival of Dardanus, the land that would come to be called Dardania (and later still Troas) was known as Teucria and the inhabitants as Teucrians, after King Teucrus. Teucrus's daughter Batia was given in marriage to Dardanus, and after King Teucrus's death the land came to be known as Dardania.

Reference: Apollodorus, Library and Epitome, book 3, chapter 12, lines 1-3.

See also: Teucer.