About Constantin Cantor
Constantins brother, Georg Cantor, cited him as his four years younger brother in letter to Paul Tannery in 1896.
SOURCE: Extract provided by Julio Gonzalez Cabillon of Georg Cantor's letter to Paul Tannery [reprinted in Tannery's Memoires Scientifiques: Correspondance, edited by A. Dies, and published by J.-L. Heiberg & H.-G. Zeuthen, vol. XIII, Toulouse: E. Privat; Paris: Gauthier-Villars, 1934] [http://sunsite.utk.edu/math_archives/.http/hypermail/historia/dec99/0205.html]
Constantin died in Capri in Italy in 1899.
SOURCE': Dauben, Joseph Warren, "Georg Cantor: his mathematics and philosophy of the infinite.", page 274. [http://books.google.no/books?id=-cpFeTPJXDIC&lpg=PA274&ots=-P8ZYpq9sd&dq=Joseph%20Bohm%2C%20director%20of%20the%20conservatory&pg=PA274#v=onepage&q=Joseph%20Bohm,%20director%20of%20the%20conservatory&f=false]
Constantin Cantor, the brother of the mathematician Georg Cantor was an officer in the army and he also played the piano.
SOURCE: The late nineteenth century origins of set theory, by Phillip E. Johnson, Department of Mathematics, UNC Charlotte [http://188.8.131.52/nankaisource/public_html/article/settheory.htm]
Constantin Cantor, Rittmeister a.D., Capri, the brother of mathematician Georg Cantor, and second time married to an Italian baronesse, was at the Villa Allers on the Island of Capri, Italy on 30 November 1895. Constantin Waldemar Cantor was also registered on the same place on 26 December 1893.
SOURCE: Gästebuch der Villa Allers auf Capri 1892-1902, published and commented by Gerd Fahrenhorst [http://www.cwallers.de/gaestebuch/Gaestebuch.pdf]
Before retiring from the military, Constatin was an officer in the Hessian Dragoon Regiment. After his retirement he later died in Capri, Italy in 1899, married to an Italian baronessa.
SOURCE': Dauben, Joseph Warren (above)