Sarah GrimkÃ ( 1792-1873 ) and Angelina GrimkÃ Weld ( 1805 -- 1879 ) , known as the GrimkÃ sisters , were 19th-century American Quakers , educators and writers who supported abolitionism and women 's rights . Sarah GrimkÃ ( 1792-1873 ) and Angelina GrimkÃ Weld ( 1805-1879 ) , known as the GrimkÃ sisters , were 19th-century American Quakers , educators and writers who were early advocates of abolitionism and women 's rights .