As long as you do not have the Startup Plan, you can follow the instructions below to add an additional domain(s) to your hosting package:
1. Log into your Name.com account and click the "Account" button at the top of the screen. Then click the 'My Web Hosting" link to the left.
2. Click "cPanel Login" button in the upper right of the page
3. From your cPanel, scroll down to the "Domains" section and click "Addon Domains"
4. Type the domain in the domain, Subdomain/FTP Username, Document Root (usually public_html/domain.com), and password/confirm password.
Once this is done, go back to the "Web Hosting Dashboard" page of the Name.com account. Your addon domains will be synced automatically, but you may need to refresh the page. Then, navigate to the DNS Management section of the page and select the addon domain from the drop down list. Once you see the Addon domain DNS records (there will be no records), click the "DNS Templates" button, select the Hosting template, then click Confirm. Doing this will add the necessary DNS records and the domain(s) should be resolving properly to your web site(s) within 24 hours (assuming you have content uploaded to the server). If you also wish to use the hosting account for email, you will need to apply the Hosting Email template to add the necessary MX record in your DNS.