Well, WHOIS is more of a WHAT than a WHO 
. The WHOIS is an internet function that allows you to query the WHOIS online database for details on a domain registration. This database, the WHOIS database, contains information on the registrant of a domain. Once you register a domain (and you don’t specify that your details should be hidden), then certain information such as your name, address, email, etc. would reflect on the WHOIS database along with the domain you registered. You can see this as a seal of authentication.