Temerl Bergson (also spelled Tamarel; Hebrew name Tamar; surname alternately Sonnenberg or Berekson; Hebrew: תמריל ברגסון, died 1830) was a Polish Jewish businesswoman. She was a supporter of Jews living in Warsaw and patroness of the Hasidic movement in Poland. She was renowned for her largesse in her philanthropy toward Polish Hasidic leaders and tzadikim, and was said to have "distributed money like ashes". Referred to as the "Doña Gracia of Hasidism", she is credited with the success of the Hasidic movement in Poland in the early 19th century.