`   If we follow Wiki policy, then a man that did not rule should not be named by the title he did not hold. In Aimone's case specificly, he neither ruled nor reigned. All the people you listed have had a stronger position on their respective thrones than the Duke. I am aware of all the examples you have brought forth, but still I cannot think of a supposed ``monarch`` that was less of a monarch than Aimone. Objectively speaking, he really had little or nothing to do with that ``country``.     `