Yes, you sure can. Hosting your own domain name with us is also 100% free of charge, all you have to do is to update the name servers (NS) for your domain name to use the following.

Free-Web-Hosting.biz Clients Must Use The Following NS
ns1.free-web-hosting.biz (74.86.119.48)
ns2.free-web-hosting.biz (74.86.119.49)

You need to update your domains name server where you registered your domain name.