I think the subject says it all :). I have a free Proton account with the account name X, and a Proton Unlimited account with the account name Y. As far as I know, it is possible to have two accounts merged by contacting Proton support. However, I would like (for some reasons not to be discussed here) to have my Proton account named X rather than Y, and, of course, I would like to keep my Proton Unlimited features, hence my question.
I’d contact support, ask them to merge the free to your unlimited one, then change so your X be your main mail.
Exactly what I did as well. Its a bit of a process, but only a few steps. Support will spell it out for you when you contact them.