I'm reluctant to open up a new front in the research right now. But I'm sure that the same dynamics of royal culture will continue to apply as we move forward in time. There will continue to be one royal family that expands and contracts (unifies and divides) in cycles. Members of the family will assume various names in various places giving the impression of independent dynasties, but in fact there will be "one ring to bind them".
For example, we already know that Bran and Caractus travelled back and forth between Rome and that the Pendragons ("priest-kings") of Celtic Britain were intermarrying with Roman elite (and therefore were in fact members of the Roman elite in disguise). The pattern is no different than any other locale within the Roman/royal sphere that we have studied, including in Jerusalem or in far away Parthia.
The name Bran ("raven, strong") is rather generic and derives from the Celtic equivalent of the god Osiris. Recall that ravens fed the Osiris figure Elijah and that in Hebrew the epithet Uz/Azar, "strength, help" was applied to the Osiris typology. The severed head of Bran was also considered sacred, as in the Osiris myth.
Jesus and Paul both identified with this god, but we shouldn't be too quick to make an association. Gardner places the death of Bran in 74 AD, in the neighborhood of the time of death for Jesus (~65 AD) and Paul (~66-72 AD. But there are other members of the royal family to consider as well.
Anyway, this is how I would pursue the subject.
© Charles N. Pope, US Library of Congress. All rights reserved.