The article discusses the scientific and practical activities of the founder of Uzbek onomastics, Doctor of Philology, Professor Begmatov Ernst Azimovich in the fields of anthroponymy and toponymy. It examines the content of his monographs and dictionaries, as well as his scientific views and interpretations with a special focus on his micro/macro-onomastic formulations (protranstva) regarding proper nouns (onyms), the formation of anthroponyms, anthroponymic indicators and anthroponymic units such as names, surnames, patronyms, nicknames and pseudonyms. By dealing with Azimovich’s views on the spelling of names, the study also analyzes the function of the anthroponymic units.