Literally never heard of this before, lived in a few NE states and registered lots of kids for school at my old job. I do think there are some cultures that embrace stringing names but I haven't seen it, even if I did they might keep it on the downlow because of antiquated record keeping systems causing so much trouble. In fact, most of the systems I've seen are really bad at cross referencing family members with different last names, I was making notations all over the place to accommodate the reality that some people marry but don't swap names, some hyphenate, some don't marry but the kid takes dad's name, some divorce and change names, some divorce and remarry and change names , some kids have surrogate caregivers, some kids are siblings in the same house with different last names... the world needs to catch up.