Around here, in Delaware, and also in the neighboring parts of Maryland, MargaretAnn is extremely common as a double name for old ladies. Like NormaJean in Oklahoma. And the local accent slurs MargaretAnn into Mar-Gur-DAN.
MargaretAnn is hardly much better in terms of boringness, because Ann is another name that leaves me wanting more. I could probably warm up to Margadan as a name though. That would at least make me stop and say "what?"