Seasonal pronouns and commas

Ye or you ? And whither the comma? Two inquiries into the the words “God rest ye/you[,?] merry[,?] gentlemen,” in song (RamsesThePigeon) and paragraphs (Grammarphobia).

Thanks to Kevin Hart for making me think about this title. (Because someone asked: he’s a friend in the blogosphere, not the actor.)

[My immediate association when I hear the words “rest you”: Edgar’s words to Gloucester in King Lear: “Sit you down father, rest you,” as heard at the end of the Beatles’ “I Am the Walrus.”]