Duzh-Dushewski was born into a Roman Catholic petty nobility family in Hlybokaye on 27 March 1891.

[citation needed] At that time, according to his own memories, he created the draft of the white-red-white flag of Belarus[citation needed] that was very quickly adopted by the Belarusian nationalists throughout the European part of the former Russian Empire and later adopted as the state flag of the Belarusian Democratic Republic.

[1][2] He was then chosen as the president of the newly formed Central Belarusian Council of Vilnius and Grodno Regions.

[1] On June 20, 1919, eleven days after the Congress, together with Ivan Luckievič and Paweł Aleksiuk, he was received by the Polish Chief of State, Józef Piłsudski, and expressed, on behalf of the Belarusian population, the desire to attach the whole of Belarus to Poland.

[3] He met with Piłsudski again in July, where he obtained a promise of assistance in organizing a Belarusian army and a commitment to revoke the decree requiring local government officials in the eastern territories to have mandatory knowledge of the Polish language.

[4] On April 13, 2004, Duzh-Dushewski was posthumously awarded the Cross of Rescue of the Perishing by the President of Lithuania.