I never looked up
Regina. Once again, I'm just repeating what I've read on many other sites. In the comments section on this site, people gave that meaning as well. I don't know, I guess when you read something enough, you believe it's true since there's no way to know for sure. I mean, if Shakespeare was the first to use it for
King Lear's daughter, I can see where sites would get "royal" as a meaning for a little girl.