The most recent Speculum has an article identifying Chaucer's scribe (who copied Boece and Troilus and Criseyde) as a fellow named Adam Pinkhurst. Much of the article after the original identification is speculative, but the naming of the scribe seems sound. I should note, however, that I'm not familiar with the hand and have not seen the manuscripts in question. Nevertheless, strength of the argument combined with its publication in Speculum (which presumably had the paper reviewed by specialists more familiar with the subject than I) suggests that we can accept Adam Pinkhurst.
What I really like about this name, though, is that it is also sometimes spelled "Penkhurst." I like to imagine that it was pronounced "Pen-cursed," which would be a really delightful name for a scribe. Even better is the idea of "Adam Pen-cursed," as if the Fall of Man resulted from disobedience of the pen rather than eating the Forbidden Fruit.