Will is a boy’s name of English, German and Teutonic origin. Meaning in English: Diminutive of William ‘Resolute protector; will.’. Meaning in German: Will-helmet. Meaning in Teutonic: Strong helmet. Will is a short form of William. Famous bearer: poet and playwright William Shakespeare (1564-1616) and William Wordsworth (1770-1850). The name has 4 letters.