Zhongolovich Ivan Danilovich 
(08.02.(20.02)1892–29.09.1981)

Soviet astronomer, gravimeter and geodesist, Arctic explorer, Honored Scientist of the RSFSR, honorary polar explorer. 
Born in Grodno. In 1916 he graduated from the Physics and Mathematics Faculty of Petrograd University and a year later was mobilized into the Navy. 
Zhongolovich's activity was connected not only with desk research, but also with participation in numerous expeditions. He began in 1919 with an expedition to study the Kursk Magnetic Anomaly. In 1920–1930 Zhongolovich worked at Main Hydrographic Department, annually participating in expeditions to explore various areas of the Arctic Ocean. In the years 1930-1938 he, being a teacher of the Military Academy of Sciences, traveled to the Pamirs, was a member of high-latitude expeditions, was one of the developers of the scientific program of the expedition North Pole-1, worked on the icebreaking steamers “Sadko” drifting in the ice, “G. Sedov" and "Malygin".

At the same time, since 1920, Zhongolovich worked at the Astronomical Institute, since 1943 the Institute of Theoretical Astronomy, where he served as deputy director.

The main scientific works of Zhongolovich are devoted to theoretical and practical astronomy, the study of the shape and field of gravity of the Earth, satellite geodesy, and geophysics. He was the chief editor of the Maritime Astronomical Yearbook and Aviation Astronomical Yearbook magazines.

He died in Leningrad, was buried in the cemetery of the Pulkovo Observatory. 
Islands in Tsivolki Bay in the south of the southern island of Novaya Zemlya. Hydrographs of the Northern Hydrographic Expedition were named in the 1920s. 
An island in Obsedya Bay in Moller Bay on the west coast of the southern island of Novaya Zemlya. Named by hydrographs of the Northern Hydrographic Expedition  in the 1920s.