Interesting to consider, this may have been Paul's son Onesimus mentioned in Philemon 1:10. "I appeal to you for my child, Onesimus, whose father I have become in my imprisonment."
I believe Barbara Thiering has argued that Paul married late in his career. Her name was Phoebe; she was a deacon in the church in Cenechreae. p. 202 "Jesus the Man."
Thanks for the BThiering web-site!
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