Correction, Ebsworth mentions and quotes a bit of "The Rale Ould Irish Gintleman" (5 verses he says) from Dinny Blake's Sprig of Shillelah (pretty much a generic title), but doesn't say specifically that Blake wrote it, nor does he give it's date.

His notes on other descends, 'Fine old/(even young) x gentleman' are in his notes to 'An Antidote to Melancholy' (1661) in his reprint edition of 'Choyce Drollery' (1656), 1876 (of which 'Choyce Drollery' isn't a large part).