Roving Jack arrives in Dublin and becomes a porter, pastry cook, baker, coffin maker, preacher .... listing the Dublin sites for each of his many occupations. He can't keep a job but places his "chief delight in courting pretty maids"
OLochlainn begins "I am a roving sporting blade" which improves an internal rhyme with "trades" but loses a play on "black Jack" and "Jack of Spades" - BS
There is an old-time country item, "Jack of All Trades," recorded by the Prairie Ramblers and by "Weary Willie" (Frank Luther) and Carson J. Robison, as well as more recently by Bob Bovee and Gail Heil. That has been credited to "Howard Johnson," though I wouldn't be surprised if Robison is largely responsible. That follows the same "gimmick" of a guy who can't keep a job, though the part about chasing girls is absent. I suspect but can't prove influence. It's definitely not the same song, though. - RBW