Dönmeh
The Dönmeh (Hebrew: דוֹנְמֶה, romanized: Dōnme, Ottoman Turkish: دونمه, Turkish: Dönme) were a group of Sabbatean crypto-Jews in the Ottoman Empire who were forced to convert to Islam, but retained their Jewish faith and Kabbalistic beliefs in secret.
The Sabbatean movement was centered mainly in Thessalonika. It originated during and soon after the era of Shabbetai Tzevi, a 17th-century Sephardic Jewish rabbi and Kabbalist who claimed to be the Jewish Messiah and eventually feigned conversion to Islam under threat of capital punishment from the Ottoman sultan Mehmed IV. After Zevi's forced conversion to Islam, a number of Sabbatean Jews purportedly converted to Islam while remaining secretly faithful to Judaism after their leader, and became known as the "Dönmeh". Some Sabbateans lived on into 21st-century Turkey as descendants of the Dönmeh.