W

W (named double-u, plural double-ues) is the 23rd letter in the modern English and ISO basic Latin alphabets.

The sounds /w/ (spelled ⟨V⟩) and /b/ (spelled ⟨B⟩) of Classical Latin developed into a bilabial fricative /β/ between vowels in Early Medieval Latin. Therefore, ⟨V⟩ no longer adequately represented the labial-velar approximant sound /w/ of Germanic phonology.

The Germanic /w/ phoneme was therefore written as ⟨VV⟩ or ⟨uu⟩ (⟨u⟩ and ⟨v⟩ becoming distinct only by the Early Modern period) by the 7th or 8th century by the earliest writers of Old English and Old High German.Gothic (not Latin-based), by contrast, simply used a letter based on the Greek Υ for the same sound. The digraph ⟨VV⟩/⟨uu⟩ was also used in Medieval Latin to represent Germanic names, including Gothic ones like Wamba.

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