All the search engine credibility a website builds up is attached to the name. If you are happy to use a name that already has already been used and has some credibility, it could give the new
site a boost. However if you are not the registered owner of the name I would consider carefully before using it or try to have the name put in your name.
We can purchase a domain name on your behalf should you wish. However Reason8 use a third party as we are not domain registrars. To have a name you've already purchased pointed to your website you would need to change the Nameservers.
The Reason8 nameservers are
nameserver1: ns.reason8.com
namerserver2: ns1.reason8.com
We hope this helps,
Reason8 Support