John Dawson -- singer, songwriter, rhythm guitarist, & originating NRPS member -- was nicknamed "Marmaduke". Take a look at photos of John S. Marmaduke, Confederate General &, later, a Missouri governor, and you'll know why Dawson was given that nickname.
Lochinvar: The hero of a ballad in Scotts MARMION who carries off his sweetheart from a celebration at which she is to be married to another another dude.