Cochin Jews are the oldest group of Jews in India, with roots that are claimed to date back to the time of King Solomon. The Cochin Jews settled in the Kingdom of Cochin in South India, now part of the state of Kerala. As early as the 12th century, mention is made of the Jews in southern India.
On the low end, this makes Rh negatives 16% and on the high end 19.36% of the population.
Overall, Kerala has the highest percentage of Rh negatives in India.