Indian Jews as told by wikipedia

Indian Jews are a religious minority of India. Judaism was one of the first non-Dharmic religions to arrive in India in recorded history. The better-established ancient communities have assimilated a large number of local traditions through cultural diffusion. The Jewish population in India is hard to estimate since each Jewish community is distinct with different origins; some arrived during the time of the Kingdom of Judah, others are seen by some as descendants of Israel's Lost Ten Tribes