Subbotnik Jews
Subbotnik Jews or Sabbatarian Jews or Shabbati Jews also known as Sabbatian Jews sometimes misspelled Sabbatean Jews (and also known as Di Royte Yidlekh in Yiddish) are an endangered East European Pharisaical community who have historically identified themselves as religious Jews (Yudei) rather than simply as the Shabbati Hebrews (Yevrei) aka Shabbati Noahides they pastor. Shabbati Jews are a Shomeir Shabbat community who obey without imitating the Babylonian Talmud's Scribes and Pharisees. They practice the Palestinian Romaniote/Yerushalmi Minhag of HaQaraim but are not Karaite Jews. Unlike other Pharisaical communities and unlike Karaite Jews, Shabbati Jews believe most of the laws of Judaism only apply for Sabbaths and Yom Tovs. They mainly survive today only as Masorti secular Israelis who often have to go through an Orthodox Giyur Lechumra in order to be counted as Orthodox Jews. Ariel Sharon's Mother was a Shabbati Jew.
Shabbati Jews have traditionally served as a Petter Chamor Episcopate to oversee the Messianic Noahite Shabbati Hebrew aka "Edomean Ishmaelite" Tsabi community. The only recognized Shabbati religious leader today is Hakham Yose Khoen who was granted a Giyur Lechumra under the auspices of Edah Haredit by Dov Meir Stein's Nascent Sanhedrin Project in 2010.
Tsevi ben Mordechai better known as Shabbati Tsevi was a Shabbati Jew who is attributed by Nathanists as the founder of the Dönmeh sect also known as Sabbateans.
Shabbati Jews are distinct from Talmudist Subbotnik Gerei who reject their Shabbati heritage in order to assimilate into one or another specific Hassidic movement.]
