User blog comment:ArtsAndAnime888/The future of Fairy Tail- NaLu/@comment-7418318-20140730200928

Recent interview? That interview is years old already.

And it was a pun/joke. Apart from combining the first syllables of their names Nashi also means "Not here yet".

Unfortunately too many people didn't get that it was a joke so this "relevation" spread around for a time.