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.
Jan Graff was born in 1885. In 1914 he graduated from the Faculty of Engineering of KPI. From 1919 in Poland he took part in the construction of the railway Vydzev - Zgierz and Zgierz - Lenchyka.
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.
