Why i have this on my PROFILE?

This player is linked to multiple profiles

He is a hacker or something.. ? this is the guy: https://www.gametracker.com/urloiudennis/

he get added on my profile how ? lol how i delete him ?

This is why we have a Guides and FAQs section.
(also linked in my posting 'signature' below)

How to Report a Page

so how i delete that profile? he change his nick to "Mau" than he claim to my nick-name on server.

You don't delete anything.

Read the link I provided.

I read it, i don't understand.

Quote: "For Incorrectly linked nicknames:
Go to the user's profile (not the player stats page), locate the Nickname, click the REPORT button next to it, and submit a brief description of the issue."