Were the Therapeuts of Egypt Buddhists?

In this regard, there does indeed exist evidence that Jews were influenced by Indian religion. In Against Apion (1.22/1.179), Jewish historian Josephus (37-c. 100 AD/CE) recounts the words of Clearchus of Soli (fl. 320 BCE), who told the story of his master Aristotle's conversation with a Jewish man from "Celesyria" or Syria. Aristotle (384-322 BCE) supposedly stated that the man told him these Syrian Jews "are derived from the Indian philosophers; they are named by the Indians Calami, and by the Syrians Judaei, and took their name from the country they inhabit, which is called Judea..."

Hence, at least three and a half centuries before the common era there were purportedly Indian "Jews" in Syria, whose institutions and communities may have welcomed readily the missionaries from Ashoka a few decades later.

Source: Buddhism's Relation to Christianity