In regards to marrying into noble houses, if a noble man marries a noble woman from a different house, I would assume one of two things happens: 1. The woman takes the man's name and the two houses become allied to one another. 2. They make their own name and marshall the coat of arms. If this is incorrect, please do correct me by all means.
But say a common man marries a woman of a noble house. Does he take their name? Does she take his name but he is of her house? Or, assuming the noble woman is the heir, does she take his name and the name of the house changes also?
I would point out I am speaking in general for fantasy purposes (and yes, I know I can technically say what I want because I'm making it up, but I'd like to have strong basis in fact), so I understand that this exact situation may in fact never have actually occurred; but even so, I'm supposing there'd be a set precedent in case.
EDIT: As it's fantasy it isn't strictly European but drawing from pretty much anywhere with a similar social structure. Information from any European country or elsewhere (Russia, for instance, but anywhere) would make me very grateful, especially if the area could be mentioned in the answer. Also, let me stress, this isn't like a plot point or anything, I'm just curious but as I'm thinking about it in terms of personal fantasy fiction it doesn't have to have a real-world example of it happening to satisfy me. I realise it's an unlikely thing to happen but the point is it is possible.