In Life of the Blessed Virgin, page 182, it says Mary Cleophas' eldest child was about 4 or 5 years old at the time of the flight to Egypt (6 BC).
According to Life of the Blessed Virgin, he was present at Mary's death (pages 216-226). According to Hegesippus, Clement of Alexandria, and Eusebius of Caesarea, killed in 69according to Josephus in 62 (wikipedia: James, brother of Jesus).
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