Technically it looks like you want a certificate for a different (new?) Domain name - Wikipedia.
A URL - Wikipedia is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it.
Obtain an SSL Certificate for the domain you want to keep (via Certbot)
For the outgoing domain, you will want both a SSL certificate and a redirect for all traffic onto the new domain. The easiest 2 methods are:
Run the second domain on the same hosting provider, have certbot get the certificate, update the server with a rewrite rule.
Run the second domain on Cloudflare and install a global "Page Rule" (You get 3 on a free plan) to redirect all traffic to the new domain. Cloudflare will manage the SSL for you, and you can even transfer both Registrations to them and pay wholesale pricing.