VAV (Waw; Heb. ו;וָו), the sixth letter in the Hebrew alphabet; its numerical value is therefore 6. In the mid-second millennium B.C.E. proto-Sinaitic inscriptions the letter resembled a mace or a peg (= vav)
The old Phoenician waw is the ancestor of some Latin letters: the consonant "F", which developed from the Archaic Greek digamma; "Y" (the Greek vowel (upsilon), which is the first of the five letters added by the Greeks to their alphabet and which the Romans turned into "U" and "V". See *Alphabet, Hebrew.
Source: Encyclopaedia Judaica. © 2008 The Gale Group. All Rights Reserved.