Wynn (Ƿ ƿ) (also spelled wen, ƿynn, or ƿen) is a letter of the Old English alphabet, where it is used to represent the sound /w/.

While the earliest Old English texts represent this phoneme with the digraph〈uu〉, scribes soon borrowed the rune wynn w(ᚹ) for this purpose. It remained a standard letter throughout the Anglo-Saxon era, eventually falling out of use (perhaps under the influence of French orthography) during the Middle English period, circa 1300. It was replaced with〈uu〉once again, from which the modern developed.

The denotation of the rune is "joy, bliss"