In nostr, anyone can use any name and any picture on their account. Also, anyone can “verify” themselves using NIP-05 which you can 1) pay someone to set up for you (there are websites that will do it for you for a small fee like nostrplebs.com) or 2) figure out how to do yourself with a website that you control. The only thing that makes your account unique in that case is 1) your public key (aka npub) and 2) where/how you decide to verify your account