Photo. Wilhelm Cnoop Koopmans (1837-1895). Profession: Professor of theology, partner at distillery Lever & Co. Relation to Mahler:  One to the ...
Wilhelm Minkus
No photo. Wilhelm Minkus (0000-0000). Profession: Impresario. Residences: Vienna. Relation to Mahler: Correspondence with Mahler: Yes. 10-06-1908, Year 1908. 30-06-1908, Year 1908 ...
Willem Hutschenruyter (1863-1950)
Willem Hutschenruyter (1863-1950). Profession: Horn player, administrator Amsterdam Royal Concertgebouw Orchestra (RCO). Relation to Mahler: Correspondence with Mahler: Born: 22-09-1863 Rotterdam, ...
William Backhouse Jr. Astor (1829-1892)
William Backhouse Jr. Astor (1829-1892). Profession: Entrepreneur. Residences: New York. Relation to Mahler: Correspondence with Mahler: No. Born: 12-07-1829, Manhattan, ...