No mention whatsoever , the Harry is another name for the devil, satan, or Lucifer. Nothing at all, but what I typed above.
In " YOU ARE YOUR FIRST NAME ", by Ellin Dodge Young, on page #175 : Harry ( English diminuitive of Henry/Harold/Harris/ Harrison/alone ) . Nope, nothing at all about the devil.
In " THE NAME GAME ", by Christopher P. Anderson, on page #206 : Harry... see Henry. Henry : " ruler of the home " ( Tutonic ) ; Var. and dim. Heinrich,Hendrick,Henri,Enrico,Harry,Hal,Hank,Henny. Hmmmmmm... no devil there either.
Since you have now been discredited, proven to be a liar, and a know nothing, I suggest that you read Jeffrey Burton Russell's four book series : " THE DEVEIL ", " SATAN ", "lUCFER ",and " MEPHISTOPHELES " , in order to fully acquaint yourself with the names and attributes og the devil, from antiquity through mdern times. If you are still feeling an immediate need for some more of his many appelations, here goes : The Horny One, the devil, Satan, Lucifer, Mephistopheles, Old Nick, The Prince of Darkness, the Prince of Evil, Belial, Scratch, mal'ak Yahweh,deofol, diavolo, diablo, Teufel,Old Hairy, Black Bogey,Lusty Dick, Dickens,Dickon,Gentleman jack, Satanael,Knecht Ruprecht, Hammerlin, Fererwisch, and on and on and on and on; but, NO HARRY !