The Whois of your domain contains all the official information of the domain holder and decides the legal ownership of the domain. The domain holder is thus the owner of the domain.
It is important to always use the most up to date information such as your name and email address. These are of great importance regarding all legal and technical cases of the domain. Do you not want to show your information? Then you can choose to protect your data using privacy protect or to use our (Domeinwinkel) details to be shown in the whois.