Fidelis Chojnacki was a Polish Capuchin friar and Catholic priest born in 1906 in Łódź. After working as a clerk in Warsaw, he entered the Capuchin Order in August 1933. He pursued studies in philosophy at Zakroczym and theology in Lublin, where he also established an intellectual club for seminarians and wrote religious articles. His ministry included leading Catholic Action and assisting individuals recovering from addiction. He was arrested in January 1940, leading to his imprisonment in concentration camps.