[gilleain]

Quite unique? There is one other internet user with my first name and I once accidentally got signed up to a social network account meant for him.

Your name is either unique or it isn't...

[vojnovski]

Unique as in I can't find anyone else with my name+surname on the internet. Quite, as in I can't be sure that a person with that name does not exist (short of a SHA-1/MD5 hash as suggested above, but even there one cannot be sure: https://security.googleblog.com/2017/02/announcing-first-sha...). :)