Tadeush Alexander Graff (Tadeusz Aleksander Graff) was born in Warsaw in 1886. He left secondary school in Vinnytsia, then he studied in KPI at mechanical faculty. He participated in the Polish student's organizations: in the Brotherly help and Corporation, cooperating with Kazimir Vezheysky..
Anton Alexander Skudra (Antoni Aleksander Skudro) was born in 1882 in Mogilev on Podillya. He graduated from the gymnasium in Kishinev, studied at the Kiev university at mathematical faculty. In 1901. He was expelled from the university for participation in illegal students strike.
Shanyavsky Karol (Karol Szaniawski) was born in 1891 in Ukraine, Cherkassy district, Rotmystrovtsi. His father was a family doctor. He graduated from high school in Yelyzavethrad (now Kirovograd) and in 1909 was enrolled to the mechanical department of Kyiv Polytechnic Institute.
Stanislav Kanevsky was born in 1881, graduated from the Mechanical department of Kyiv Polytechnic Institute. During the study he participated in the activities of the Polish organizations: student’s corporation of KPI and also fraternal assistance at KPI.
Leon Borowski was born in 1884 in Humany in the Podillia of the family doctor. High School graduated there in 1903 in the Kiev Polytechnic Institute in 1913 received the bachelor's Civil Engineering Department.
Witold Kazimierz Vezheyskyy (Witold Kazimierz Wierzejski) was born in 1882 in the village Derebchyn (Yampolsky district) in the Podillia, the son of a sugar factory worker. He studied at the school in Vinnytsia. In 1900 he became a student of mechanical department of Kyiv Polytechnic Institute.
