“Register of the entire army” 1649 and the inhabitants of the city of Trypol in the defense of Ukraine.

For the nation’s historical memory, knowledge about the people involved in historical events is no less critical than memory about these outstanding events. The war led by Bohdan Khmelnytsky in the 17th century shaped the mentality of Ukrainians in defending their native land. It is essential that, along with the names of hetmans and colonels, we remember today,when the war for the future of Ukraine is again underway, it is time to turn to the experience and names of the people who stood in its defense almost four centuries ago. The Register of the Zaporozhian Army of 1649 preserved tens of thousands of surnames of Cossacks, which opens up the opportunity to study the composition of the military formations of the Cossack State at the local level. Research in this direction mainly concerned the supervisors, not the army’s rank and file, which is essential to correct. The subject of our study is the social, professional, and ethnic composition of the Cossack formation (hundreds) according to information from written sources. The primary source of the survey is the Register of the Zaporozhian Army of 1649. Using the example of the Trypol Hundred of the Kyiv Regiment, we will examine the social profile of the city's inhabitants that became its base. Trepol (11th – 14th centuries), later Trypol (15th– 18th centuries), is a city and now a village of Trypillya with a vibrant, sometimes tragic, thousand-year history, one of the pages of which was the history of Trypillya Hundred. The article analyzes a list of Cossacks, which includes 171 people. Our analysis is based on the etymology of their surnames.It is the source of our conclusions about their social and professional affiliation. Some surnames probably indicate the ethnicity of their owners. Part of the information is compared with existing research on the Cossacks of that time. We consider this study to be the initial stage of further analysis of the composition and history of the Trypillya Hundred.