"So all pervasive indeed was this moral
philosophy of the Stoics that it was read by the Jews of Alexandria
into Moses under the veil of allegory and was declared to be the
inner meaning of the Hebrew Scriptures."
Source for above quote:
To add, I have this biography here and there is no reference of Zeno being Jewish(Although he was a merchant):
I know that Seneca was offering large loans of money in Spain and England with interest rates upwards of 30%! This was in part why Nero was so threatened by him and why he put him to death by forced suicide.
My Rabbi recommend this link:
Once again showing that they were strangely interlinked but no reference to any of the Stoics themselves being Jewish.