WinnaXX

WinnaXX is the nickname of a user/profile on Bitcoin OTC (OTC) and the URL you provided points to a page that would display that user's GPG key(s) and related public-identity details on bitcoin-otc.com. I couldn’t retrieve current, verifiable details from the page itself here, so I can’t confirm any specific identity information beyond the likely fact that WinnaXX is a Bitcoin OTC user with an associated GPG key on the platform. If you’d like, I can try to fetch the latest publicly available information again.