Asking on behalf of a friend....
They would prefer to have the same name after marriage and for any future children to have the name too.
They would have preferred to double-barrel or portmanteau the names rather than one person take the other person's name.
Unfortunately the names don't work very easily for that...
The names are something like Van Driesen and Sampson.
How would you try and make this work? Can you double-barrel a name where one of them already has two bits to it?