Gregório Gregorievitch Bondar (1881 – 1959) was a Ukrainian-Brazilian agronomist and entomologist that greatly contributed to Brazilian Entomology.

Bondar was born to a family of farmers who owned 5 hectares of land in the village of Malaia Buromca, district of Zolotonosha.

He initially worked as a free-lance photographer, being hired in 1911 as research assistant in the plant pathology department of the Campinas Agronomical Institute.

His sentence was never executed and, in 1920, he was freed on the condition of organizing agricultural defense against a locust outbreak attacking wheat in the southern part of the department of Yeniseysk.

In 1938, he was hired as a technical consultant by the Instituto Central de Fomento Econômico da Bahia.

He also published several articles of economic botany of plants in the families Apocynaceae, Euphorbiaceae, Araceae and Arecaceae.

The Bondar collection was acquired by David Rockefeller and donated to the American Museum of Natural History, including his type specimens.