Letter "V" #wip
V (named vee /viː/) is the 22nd letter in the modern English alphabet and the ISO basic Latin alphabet.
The letter V comes from the Semitic letter Waw, as do the modern letters F, U, W, and Y. See F for details.
In Greek, the letter upsilon 'Υ' was adapted from waw to represent, at first, the vowel [u] as in "moon". This was later fronted to [y], the front rounded vowel spelled 'ü' in German.
In Latin, a stemless variant shape of the upsilon was borrowed in early times as V—either directly from the Western Greek alphabet or from the Etruscan alphabet as an intermediary—to represent the same /u/ sound, as well as the consonantal /w/. Thus, 'num' — originally spelled 'NVM' — was pronounced /num/ and 'via' was pronounced [ˈwia]. From the 1st century AD on, depending on Vulgar Latin dialect, consonantal /w/ developed into /β/ (kept in Spanish), then later to /v/. During the Late Middle Ages, two forms of 'v' developed, which were both used for its ancestor /u/ and modern /v/. The pointed form 'v' was written at the beginning of a word, while a rounded form 'u' was used in the middle or end, regardless of sound. So whereas 'valour' and 'excuse' appeared as in modern printing, 'have' and 'upon' were printed as 'haue' and 'vpon'. The first distinction between the letters 'u' and 'v' is recorded in a Gothic script from 1386, where 'v' preceded 'u'. By the mid-16th century, the 'v' form was used to represent the consonant and 'u' the vowel sound, giving us the modern letter 'u'. Capital 'U' was not accepted as a distinct letter until many years later.
In Japanese, V is often called "bui" (ブイ), possibly due to the difficulty of typing "vi" (ヴィ) or even "vui" (ヴイ), an approximation of the English name which substitutes the voiced bilabial plosive for the voiced labiodental fricative (which does not exist in native Japanese phonology) and differentiates it from "bī" (ビー), the Japanese name of the letter B. Some words are more often spelled with the b equivalent character instead of vu due to the long-time use of the word without it (e.g. "violin" is more often found as baiorin (バイオリン) than as vaiorin (ヴァイオリン)).