Following the capitulation of Jerusalem in 37 BC during the campaign by Mark Antony and Herod against the Hasmonean king Antigonus II - Costobar controlled the exits from the city.
Costobarus was from a noble and priestly family in Idumæa;[10] and he resented that the Hasmonean John Hyrcanus had made the Idumæans adopt the customs and laws of the Jews.
Then Salome added the third revelation (but the first and longest running transgression): Costobarus had been protecting, for at around 12 years,[15] the sons of Baba,[6] Herod’s enemies.
“And when the king [Herod] was informed of these things ... he sent [his officers] to the place where they were reported to be staying, and had them kill these men and those who were accused with them ...” [16] And so, Costobarus was executed (c.27-25 BC).
[23] When the Jewish insurrection against Roman rule was gaining momentum, Costobar, Saul and Antipas requested Agrippa II to send assistance to prevent the imminent uprising.
[25] Following the Battle of Beth-horon (25 November 66 AD) [26] in which the Jewish insurgents defeated the Roman general Cestius, Costobar, Saul and Antipas were besieged in the royal palace.
Subsequently, Costobar, with his brother Saul, escaped from Jerusalem to re-join Cestius: who dispatched them to Emperor Nero in Archaia, Greece.
According to this theory, references to Saul in Acts of the Apostles and some verses of Paul's Epistle to the Romans are believed to reveal connections to the Herodian royal family.
The younger Salome was the matriarch of the Christian Aristobulus of Britannia according to Lionel Smithett Lewis, although his work does not follow the standards of modern genealogical research and is based on medieval legends.