Yisrael Yosef Kniazer. Source: E. A. Mandelbaum & R. Persitz, Yi'srael Be'Olympiadot: Helsinki - Amsterdam - Moskva - Skirat Ptichot U'Mivchar Siyumim [Israel at the Chess Olympiades [sic], Helsinki - Amsterdam - Moscow - A Review of the Openings and Selected Endings. Tel Aviv: Yeduha Marcus Press, 1958, p. 95.
Several correspondents, including Moshe Roytman, notified me that Tel Aviv's Chevra Kadisha web site (link in Hebrew) notes that Kniazer had been born on April 1st, 1894, and died on May 4th, 1958. Thanks to all the correspondents!