Answer

On the evidence currently available, no securely identified Greek-born Jain from the Indo-Greek Kingdom period is known. The main scholarly summaries of religion in Greco-Bactrian and Indo-Greek lands describe Greek cults alongside local Zoroastrian, Buddhist, and Hindu cults; the best-known Indo-Greek ruler, Menander, is associated with Buddhism rather than Jainism. ( academic.oup.com)

Explanation

So the careful historical answer is: we can speak of Greek contact with Indian religions in that era, but we cannot confidently name a Greek Jain from the surviving record. That is an inference from the evidence we have, not proof that such a person definitely never existed. ( academic.oup.com)

Spiritual Understanding

From a Jain perspective, this is a good place to use anekāntavāda, the Jain principle that reality has many aspects and that our knowledge is partial if we speak too absolutely. In historical matters, this means clearly separating what is established, what is likely, and what is only possible. ( britannica.com)

Takeaway

In short: no named Greek Jains from the Indo-Greek Kingdoms are securely known from the historical evidence available today. ( academic.oup.com)