Ludwig Josef Johann Wittgenstein (/ˈvɪtɡənˌstaɪn/; German: [ˈvɪtgənˌʃtaɪn]; 26 April 1889 – 29 April 1951) was an Austrian-British philosopher who worked primarily in logic, the philosophy of mathematics, the philosophy of mind, and the philosophy of language. From 1929 to 1947, Wittgenstein taught at the University of Cambridge. During his lifetime he published just one slim book, the 75-page Tractatus Logico-Philosophicus (1921), one article, one book review and a children's dictionary. His voluminous manuscripts were edited and published posthumously. Philosophical Investigations appeared as a book in 1953, and has since come to be recognised as one of the most important works of philosophy in the twentieth century. His teacher Bertrand Russell described Wittgenstein as "the most perfect example I have ever known of genius as traditionally conceived; passionate, profound, intense, and dominating."
↑ Hamburg Passenger Lists, 1850-1934, ancestry.com: Name: Ludwig Wittgenstein. Gender: männlich. Departure Age: 32. Occupation: Lehrer. Birth Date: 26 Apr 1889. Birth Place: Wien. Departure Date: 30 Juli 1921. Port of Departure: Hamburg. Destination: Bergen. Ship Name: Mira. Shipping Clerk: Rob. M. Sloman jr.. Shipping Line: Det Bergenske Dampskibsselskab, Bergen. Ship Type: Dampfschiff. Accommodation: 3. Klasse. Volume: 373-7 I, VIII A 1 Band 283.
↑ England & Wales, National Probate Calendar (Index of Wills and Administrations), 1858-1966, 1973-1995, ancestry.com: "Ludwig Josef Johann Wittgenstein. Death Date: 29 Apr 1951. Death Place: 76 Storeys-way Cambridge, England. Probate Date: 10 Jul 1951. Registry: Carmarthen."
↑ England & Wales, Civil Registration Death Index, 1916-2007, ancestry.com: "Name: Ludwig J J Wittgenstein. Birth Date: abt 1889. Date of Registration: Jun 1951. Age at Death: 62. Registration district: Cambridge. Inferred County: Cambridgeshire. Volume: 4a. Page: 180."
↑ UK and Ireland, Find A Grave Index, 1300s-Current, ancestry.com: Name: Ludwig Josef Johann Wittgenstein. Birth Date: 26 Apr 1889. Birth Place: Vienna, Wien Stadt, Vienna (Wien), Austria. Death Date: 29 Apr 1951. Death Place: Cambridge, Cambridgeshire, England. Cemetery: Trinity College. Burial or Cremation Place: Cambridge, City of Cambridge, Cambridgeshire, England.
Edward Kanterian, Ludwig Wittgenstein, Reaktion Books, 30 May 2007, ISBN 1861893205. p12: Ludwig's paternal GGF was Moses Maier, of County Wittgenstein, Germany; Ludwig's GF was Hermann Christian Wittgenstein (1802-1878), who moved to Leipzig; Hermann's wife was Fanny Figdor (1814-1890, m. 1838) of Vienna. p13: Ludwig's father was Karl (1847-1913), one of ten children; had a daughter Margarete; p.14: Karl retired at age 52, living in Vienna in 'Palais Wittgenstein'; p.15: Karl's wife was Leopoldine Kalmus (1850-1926).