"The THISTLE OF SCOTLAND" has words beginning "O, the Thistle o' Scotland was famous of auld". Actually there's three (3) sets of words with this title, one printed by James Hogg [in his Jacobite Relics], another in The Modern Scottish Minstrel I think, and the third, the one you're looking for. It has a Gaelic title, "Suaicheantas na h-Alba", which means exactly "The Badge of Scotland" [otherwise flag, standard, emblem etc.] I don't have the words to hand - they are probably relatively recent.