How do I connect multiple domain names to a single Tilda website?

Unfortunately, there is no way to connect secondary domains to Tilda.

What you can do is to redirect visitors from one URL to another. Here is how:

1. Set up a redirect from secondary domains to the primary domain in your domain name registrar account. Make sure that the registrar offers this option.
2. Create a second website in Tilda, assign a secondary domain name to it.
3. Add the Redirect to URL block (T223 in the blocks library) to the primary website.
4. Publish both websites.

Learn more about redirecting http://help.tilda.ws/redirect