‘And thou wilt come to the isle Thrinacia. There in great numbers feed the kine of Helios and his goodly flocks, seven herds of kine and as many fair flocks of sheep, and fifty in each.’’ Odyssey 12.127ff. (online text: Eng., Grk.)
Scholarship has long assumed that Trinakria (Τρινακρία) is related to Homer’s Thrinacia (Θρινακίη). It is widely suspected that the name is derived from treis arkai (τρεῖς ἄκραι), and was an erroneous ‘correction’ of the name Thrinacia, owing to increased awareness of Sicily’s roughly triangular shape since the time of Homer.
Thucydides, History of the Peloponnesian War 6.2
Strabo, Geography 6.2.1