I keep having these little theories and where better than here to get a good cross-section of the population to try it out.
Anyway, this theory is that people who have unusual surnames, or ones that people always ask you to spell, at birth, marry men who do too. Those with "normal" or "common" (don't take offence at those phrases) surnames have husbands with equally straightforward surnames.
So what about you?
I fall into the former group, although its recently got easier as there is a new celebrity with the same name.