Well, that makes it official. Do Han and Leia get married in Bloodlines? Ben would be the only heir to the Organa royal family (if Leia is still recognized) so I would have thought unless they were married, he would have taken his mother’s (or grandfather’s) family name.
Kids almost always take the dad’s last name if the parents aren’t married.
In royal families though?
Ok, let me be the first to insist on seeing Ben Solo’s long form birth certificate.