No, they would never have been pirnces. Why would God give authority to usurpers? According to +Paul, all authorty is from God; none is from the devil.
Usurpers of power do not have any authority. They have force, but not authority. If they attempt to legislate, they are to be disobeyed, because, per Romans 13, they act without authority.
I would give some legitimacy to inherited authority, that is if “prince” is to be taken literally. But still, a (literal) prince might have inherited certain property rights, but he does not have authority to legislate against divine principles of justice.