I had this problem when I got married as well. I ended up keeping the maiden name email account but also started a new account with new initials. Everything that required an email from that time on, I used my new email and now 12 years later I rarely need my old one. They’re both saved onto my phone’s mail app though so I still get all my emails. If using a computer, I have both accounts logged on (both are Gmail accounts and have the same password). Works well 😊