This graph of Josephus'
      lineage [right column] is a historical reconstruction based on information
      in the opening paragraph of his autobiography & other works. He claims
      to have recorded his genealogy "as I have found it described in the
      public records" [Life 1].
      But when coordinated with historical information about the 
      Hasmonean dynasty that he himself reports in his other works [left four
      columns] there are some obvious major generational discrepancies in his
      family tree. Josephus' count of his ancestors' generations would make him
      a fourth cousin of Herod's 2nd wife,
      Mariamne,
      who died sixty-eight years before he was born! Josephus' reports of his
      own experiences make it more probable that he was at most a sixth
      or, more likely, a seventh cousin of his near contemporary Herod 
      Agrippa II, who was king of Iturea [southern Lebanon] in the decades
      surrounding the Jewish-Roman war of 66-70 CE.
      Either Josephus' memory or his family
      records were clearly confused. He begins by claiming: "My
      grandfather's father was named Simon, with the addition of
      Psellus," but goes on to represent this Simon
      Psellus as his
      "grandfather" Joseph's
      great-grandfather. Even so, he does not list enough generations
      between himself & Simon's grandson [Matthew
      Curtus], if he is correct
      in claiming that the latter was born the first year that  Johanan Hyrcanus
      was high priest. According to Josephus' dating, this Matthew's
      "son" Joseph would have been born when Matthew was 66. While not
      impossible, it is more likely that Josephus or some previous scribe
      overlooked a generation "in the public records" of the priestly
      courses of Judea. This would have been particularly easy to do, 
      if Matthew
      Curtus' son & grandson were both named Joseph.
      Josephus was probably correct in recalling
      that his own grandfather was named Joseph. But he is just as probably
      mistaken in identifying his grandfather with Matthew Curtus' son (or
      grandson) Joseph. There is no good reason to question Josephus' report
      that his own father, Matthew,
      was born in the last year of Archelaus'
      reign (6 CE). 
      But in order for this Matthew to be the son of a
      Joseph who was born in the last year of Queen Salome's
      reign (68 BCE), 
      the father would have been 74 years old when he sired a
      son. While not beyond biological credibility, it is more likely that at
      least one or, more likely, two generations were dropped in Josephus' hasty
      recounting of his family's history at the beginning of his apologetical
      autobiography. Since Josephus recalled that his family repeatedly
      named fathers & sons alternately, Matthew & Joseph---witness
      himself & his
      father & Matthew
      Curtus & his
      "son"---it is quite possible that Josephus forgot or overlooked
      such a pair in his reckoning. One advantage of this solution to the
      chronological questions raised by Josephus' family tree, is that it allows
      Josephus to be put in the same generation as his chronological
      contemporaries.
      There are three ways to interpret Josephus'
      report of his family history: skeptically, literally, or genealogically.
      Given the chronological gaps & Josephus' penchant for defending
      himself, it would be easy to reject his family tree as folklore or
      fabrication. But his insistence that he based it "on public
      records" makes this the least likely solution. Priestly lineage was
      zealously preserved by Jerusalem's conservative ruling aristocracy. Before
      the Jewish-Roman war, it was the basis of a priest's job & social
      position; and it was used to regulate the priestly courses for more than a
      century after the destruction of Jerusalem's temple. If Josephus was known
      not to be of Hasmonean lineage, it is unlikely that he would have
      dared to have publicized himself as such in writing to his contemporary
      detractors, who were vocal & many.
      While a literal interpretation of Josephus'
      family tree is not beyond belief, it stretches the biological imagination
      & raises biographical questions that are historically unanswerable.
      Did the males of Josephus' family marry late or often? Did they remain
      sexually active in old age? Did Josephus come from a line of priests that
      was orphaned young? If so, who raised & trained them? If Josephus'
      forebears had such exceptional longevity when compared with the Hasmoneans
      & Herodians he uses to date their birth, why does he fail to mention
      it?
      While the revised genealogical
      reconstruction of Josephus' ancestry presented above is beyond historical
      proof, it at least makes historical sense out of the information he
      presents. My experience in tracking down & filling in gaps in the
      family genealogy that I inherited from my own grandmother convinces me
      that this is the most plausible interpretation of Josephus' family data.