Name changing upon getting married was made illegal in 1981 around here, my girlfriend gets pissed when people make the mistake and use my family name to refer to her!
She could have done it through the regular name changing process like anyone else (which involves fees and a lot of paperwork to make sure all records are updated everywhere).
It's just not legal to do it as part of the wedding process like it's done in other provinces.
Until you have kids, of course, when the parents must decide which name/combination of their names to give the child, and that combination is limited to only one hyphenation by law.