Ernst Krenkel, Polish-Russian geographer and explorer (d. 1971)
Ernst Teodorovich Krenkel (Russian: Эрнст Теодо́рович Кре́нкель; 24 December [O.S. 11 December] 1903 in Białystok – 8 December 1971 in Moscow) was a Soviet Arctic explorer, radio operator, doctor of geographical sciences (1938), and Hero of the Soviet Union (1938). Amateur radio callsigns: U3AA, UA3AA, RAEM.