Ludwig von Mises
Ludwig Heinrich Edler von Mises was a theoretical Austrian School economist. He is best known for his work on praxeology, a study of human choice and action. Mises emigrated from Austria to the United States in 1940. Misess writings have exerted significant influence on the libertarian movement in the United States since the mid20th century.
Ludwig von Mises was born to Jewish parents in the city of Lemberg, in Galicia, AustriaHungary . The family of his father Arthur Edler von Mises had been elevated to the Austrian nobility in the 19th century, and was involved in building and financing railroads. Ludwigs mother, Adele , was a niece of Joachim Landau, a Liberal Party deputy to the Austrian Parliament.39 Arthur was stationed there as a construction engineer with Czernowitz railway company. At the age of twelve Ludwig spoke fluent German, Polish, and French, read Latin, and could understand Ukrainian. Mises was the older brother of mathematician Richard von Mises, a member of the Vienna Circle. When Ludwig and Richard were children, his family moved back to Vienna.
Source: Wikipedia