Re: Due diligence
With girls it's even harder, because her surname could change to almost anything after she marries.
Or, you know, it might not, because these days, when a woman marries, she doesn't become her husband's chattels.
I know of at least one man who took his wife's surname, and when I married, my wife kept her name (which she had previously changed to her mother's maiden name for other reasons).
But hey, let people do whatever they want to do. However, the expectation that a woman should take her husband's name when she marries is a relic of a cultural attitude towards women that doesn't have a place in modern society. Well, shouldn't, anyway.