I just did that, before you asked me ;^)
The Jews could not have survived under Portuguese rule in Cochin(1502-1663) had it not been for the Hindu king Parumal. In 1565 he gave them a strip of land next to his palace and in 1568 permitted them to build a synagogue not 30 yards from his temple. He appointed a hereditary mudaliar (chief) from among the Jews and invested the position with special privileges and jurisdiction in all internal matters in the Jewish community. This office continued in force under subsequent Rajas and even under Dutch and British rule. The Hallegua family, which still holds the title, continues to be influential in Cochin.