Leffler is a surname. Notable people with the surname include: Anne Charlotte Leffler (1849–1892), Swedish author Edward G. Leffler, salesman who started the first mutual fund Gösta Mittag-Leffler (1846–1927), Swedish mathematician Greg Leffler (born 1951), former driver in the CART Championship Car series Isaac Leffler (1788–1866), represented Virginia's 18th congressional district in the US House of Representatives in the 1820s Jason Leffler (1975–2013), NASCAR/Indy Car driver from Long Beach, California John Leffler, former Australian racing driver John Compton Leffler (1900-1987), Episcopal priest, dean of St. Mark's Cathedral, Seattle (1951-1971) Marta Leffler (1903–1990), American actress better known as Marta Linden Melvyn P. Leffler, American historian, and Edward Stettinius Professor of History at the University of Virginia Samuel J Leffler, computer scientist, known for his extensive work on BSD, from the 1980s to FreeBSD in the present day Shepherd Leffler (1811–1879), one of the two original U.S. Representatives from Iowa See also 28394 Mittag-Leffler (1999 RY36) is a main-belt asteroid discovered on September 13, 1999, by P. G. Comba at Prescott Mittag-Leffler's theorem Mittag-Leffler function Mittag-Leffler Institute, mathematical research institute located in Djursholm, a suburb of Stockholm Mittag-Leffler star of a complex-analytic function is a set in the complex plane obtained by attempting to extend that function along rays emanating from a given point