Wyn \Wyn\, Wynn \Wynn\, n. Also Wen \Wen\ [AS. w[=e]n.]

One of the runes (?) adopted into the Anglo-Saxon, or Old English, alphabet. It had the value of modern English w, and was replaced from about a. d. 1280 at first by uu, later by w.

Source: Webster's Revised Unabridged Dictionary (1913)