Giving Your Children Unique Last Names?

[Dynasty]

This was something I had never heard of before. But, a friend of mine knows a couple who give their children unqiue last names- meaning the kid's last name is not the same of either the father or mother (who kept her maiden name).

This is how it was explained: Each child receives a unique first and last name. The last names are chosen from a list of maiden and unused names from the mother and father's parents, grandparents, and great grandparents. They choose the sur names to match the first names. The idea is that each child will be independent and unique, yet still bonded to the family in love and in name.

Do you know anybody who has done this? What do you think?