Agnes Smith Lewis (1843–1926) and Margaret Dunlop Gibson (1843–1920), nées Agnes and Margaret Smith (sometimes referred to as the Westminster Sisters), were Arabic, Christian Palestinian Aramaic, and Syriac language scholars. Born the twin daughters of John Smith of Irvine, Ayrshire, Scotland, they learned more than 12 languages between them, and became acclaimed scholars in their academic fields, and benefactors to the Presbyterian Church of England, especially to Westminster College, Cambridge.