My wife kept her name - that was her choice - our kids have her name as an additional middle name to keep it alive also.It's not that unusual.
The tradition of the child getting the fathers name or even the wife taking her husbands name has stopped being universal for some time now.
Kids born of parents that aren't married have been known to take the mothers surname. I've seen and hard of more than a few women keeping their own surname when married too, especially celebs.
It's fairly common to make it up as you go along here, no laws against it in Canada