Talk:Once Upon a Zeppelin/@comment-24222380-20170525034825/@comment-10390252-20170605105137

It's an odd naming convention; I really think that the writers aren't bothering to put too much effort into family names.

FWIW, until otherwise stated, the official names are Twilight Velvet and Nightlight.

That said, I do wonder if 'Sparkle' might be a clan name the way 'Apple' and 'Pie' seem to be and members of that family are known as 'Sparkle', even if that isn't part of their personal name.