The headword first appears -- in the form Thrinakie -- in Homer, Odyssey 11.107; there it is a legendary island, home of the cattle and sheep of Helios. The identification with Sicily is later, involving other versions of the name (Trinakria, Trinachia) which reflect Sicily's triangular shape (τρεῖς, ἄκραι ). See Strabo 6.2.1, theta 499, and tau 993.