The Merovingian Dynasty, yes. In short, there is quite an evolution to what happened after the fall of Rome with the development of the Papal States and Royal houses of Europe. You have kind of the divergence of the Ghibellines and Guelphs. The thing is, the world is a big place and in order to rule, the circles of power must expand. The nature of power must evolve. Bloodlines have intermarried and changed but the power remains within those who groom their lineage. In order to control the top bloodlines have cast a net. Research the Committee of 300. There are many Houses that have needed to be brought in in order to complete their objective. The real game is over control of the human collective consciousness. It was once easy to be master over mankind. The Roman Church and its Royal Houses could simply demand allegiance under the guise of Divine Right. This of course fell under the Protestant Reformation. If the Church cannot command through Temporal or Spiritual power than what does it have? And thus the need for other ways was necessary to control humanity. Political, economic and military means gave way. Venetian mercantilism began etc. New horizons...