Both tunes had more than one name. See the Irish tune title index on my website to sort them all out. Surprisingly "Johnny MacGill" (Blarney Castle/Black Rogue) is Irish, and "Garry Owen" (from song in a play) (Auld Bessy) is probably Scots. www.erols.com/olsonw (there are ABCs of them there, too. Look in T1 first.) [Note 2 other "Johnny McGill's" are also Irish]