English speaking American facebook friend shows up as unknown bro. why?

zothermanzotherman New MemberRegistered Users 3 Posts
I have a Facebook friend living in the USA using a standard American English character set on his computer who shows up as an unknown gun bros. I can track him by his level. He tells me what his level is i.e. 107 and I look him up as unknown 107. But why is he unknown? His Facebook page is pretty straight forward English.
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