It is carried out within the family of Nai.

But it seems that there is no indoor surname at all.

However, it may also be the case of katakana.

ナィド, as a night (not what LXX said) ~

Also, have you ever heard of ザィナィド?

This was found on the Internet.

gba.com/psp_zx/200709 19 14766.shtml

If so, it should be meaningless, just a pure loan word (= = ||).

I'm incompetent, and it's not easy to get points-