I'll answer! I've recently compiled a list of books to start an investigation into the transition of Pagan Aristocratic families from late antiquity into the Papal nobility. There is definitely a gap between the 7th/10th centuries but that is for the next part. I've made sure that the entire book list is comprised of academic scholars so as to ensure accuracy of method. They are as follows:

The Family in Late Antiquity- Geoffrey Nathan

The Invention of Peter- George Demacopoulos

The Final Pagan Generation- Edward Watts

The Formation of Papal Authority- Kristina Sessa

The Last Pagans of Rome- Alan Cameron

So far I'm only about 100 pages into The Last Pagans of Rome. Cameron spends the first part explaining his definition of paganism based on its etymological roots, then dives into the late 4th century disputes between pagans such as Symacchus and Praetextatus and their petitions on behalf of Pagan members of the Senate for the restoration of the statue of Victory as well as legacy estates which funded the public ceremonies. Slow start but I think it is promising!

Np my friend. I am interested in the survival of elite families/bloodlines. People often talk about the idea, but to me the blurriest area is late antiquity. Did they survive in the Eastern Court at Constantinople, or perhaps survive in the West? If they survived in the West I think the only place they could have done so is in the Church- the one institution that survived the fall of the Western Roman Empire. I'm trying to look in to the possibility that powerful families survived from antiquity by becoming a part of the church, aristocratic families that were once Pagan in the 4th/5th century. I've got all the books piled on my desk but I'm still working on the first one so it is still gonna be some time before I have a complete picture, and it is possible that at the end what I have learned shows what I believe may not be completely correct.