Well, as someone who's son has a hyphenated surname...
It simply came about due to his mum and I not being married.
But two people with hyphenated names having a kid could be funny.
No offence meant but just where does it stop , how many generations would or could it carry thru? Also , the origins of Surnames getting mixed up with each other , might be a bit quirky. Eg. Not ideal for Boggs and Brown .. Handcock and Blewitt ... Summer and Winterbottom ......
In footy , I'm not sure how many we have had at Geelong. Seems to a popular trend , more and more coming thru.