Jezavitaŭ was born into the family of a military officer in the city of Dźvinsk, Vitebsk Governorate of the Russian Empire (nowadays Daugavpils in Latvia).

He took active part in the First All-Belarusian Congress, was arrested by the Bolshevik secret police Cheka but managed to escape.

[1][2] From 1918 to 1920 Jezavitaŭ served the Rada of the Belarusian Democratic Republic in various capacities first as Minister of Defence and then as a military attaché in newly independent Latvia and Estonia.

[7] After returning from Warsaw on April 24, Jezavitaŭ defied the agreement and wanted to evacuate the regiment from Grodno.

[8] After the defeat of the Belarusian independence movement by the Red Army, Jezavitaŭ went into exile and settled in his native Dźvinsk (which became part of Latvia pursuant to the 1920 Latvian-Soviet Peace Treaty and was renamed Daugavpils) where he lived until 1944.