This is not what I was looking for, but picked up along in my search. According to "Roman Piso", Septimius Severus was descended from Arrius Calpurnius Piso, aka "Jesus/Josephus/St. Peter". Another "genealogy" has him descended instead from Roman Emperor Titus, the ultimate Postflavian "Jesus", if my understanding is correct. I do not have the genealogy that you mentioned, of Septimius Severus descended from Cleo Selene, the grandmother of "Jesus", as the pedigree on page 151 of my copy of "Cleopatra to Christ" does not extend all the way to Septimius. Was Septimius descended from this "Jesus" or one of his siblings in the genealogy that you just mentioned? It certainly looks, from what I can ascertain, that his wife Julia Domna would have been descended from Drusilla, a sister of this "Jesus". I do agree about the significance of the Julian name, no doubt in my mind about that.