Weel, wee McGregor -[-:)]---someone has given you excellent pointers to the wedding songs, but if ye want to extol the Great Clan, how about "MacGregor's Gathering"? " The moon's on the lake, and there's mist on the brae 'and the Clan bears a name that stays nameless by day 'Our signal for fight which from monarchs we drew, "still is heard, but by night in a vengeful 'Hallooo!"

I haven't checked the index---but it'll be hiding there somewhere---