[German version]

Sixth letter of the Greek alphabet representing the sound value /u̯/at the beginning of a syllable (bilabial pronunciation as in water). The name digamma (‘double gamma’, i.e. ‘one gamma above another ’, cf. ὥσπερ γάμμα διτταῖς ἐπὶ μίαν ὀρθὴν ἐπιζευγνύμενον ταῖς πλαγίοις, Dion. Hal. Ant. Rom. 1,20,3) refers to the appearance of the letter  and unlike other letter names was coined by the Greeks themselves. The model for the digamma was the consonant wāw /u̯/ of Phoenician [3]. The digamma stands for …