You can change the name on your Certificate by going to your Udemy profile page and changing your First Name and Last Name to whatever you desire. These changes will take effect immediately in your Certificates of Completion. Please note this won’t change anything you generated and downloaded in the past of course, but the new name will be reflected in any certificates you download moving fwd and will also appear in the certificate link. You can change the name as many times as you like.
After changing these details in your Profile page just generate your certificate again by following this process.