Hyphenated last names are pretty common in Canada. Most provinces have rules about it and they're essentially: "sucks to suck, pick no more than two names and figure it out".
Some nanny-state Bolshevism right there.
Signed,
Henri Pierpont-Magnusen St. John-Smythe the 43rd. Earl of Crunchberry, Duke of Mustard Potato Salad.