Jews History in Iran

For example Jewish settlers of Elephantine (Egypt) under Persian administration remained monogamous and the husbands did not have the right to take a second wife. Monetary and property disputes were settled and decided by the special "court of the Jews".
Marriage contracts testify to mixed marriages amongst all groups including Jews. The practice was so common that the Jewish governors Ezra and Nehemiah objected it. They clamped down on these marriages and punished Jews who would marry outside the religion. Many documents, texts and contracts mention Jewish names engaged in trade, disputes or as property owners. Various documents show, Egyptian, Aramaeans, Jews and Phoenicians entered into joint business deals, contracted mixed marriages, adopted each other's customs and worshiped not only their own god, but also the gods of the aliens who lived in one city or another.
This is proved among other things, by the participation of the Jews in the rebellions against Trajan (the Roman Emperor) in Mesopotamia (116 AD). In addition, the Jews took an active part in organizing the silk trade, an advantage they owed to the evident support of the kings.

In 1948, there was a high concentration of Jewish communities in Kurdistan. There were around 12,000 Jews scattered in approximately 15 Jewish settlements in Iranian Kurdistan. After the formation of the State of Israel many Jews in the area left for Tehran, in transit to Israel. The move angered the Muslim authorities. In March 1950, 12 Jews were murdered in Kurdistan. As a result more Jews moved to Tehran and demanded protection. The Iranian government guaranteed their safe passage. By March 1951, 8000, Iranian Jews had moved to Israel, the first major emigration in 20th century. After the formation of Israel in 1949, all the Muslim countries in the region expelled their local Jewish population except Iran. By 1966, the number of Jews immigrated to Israel had reached 22,000.