• He was the father of physicist
Jean Casimir Danysz (11 March 1884 – 4 November 1914), born in Paris and a colleague of
Marie Curie, made important advances in the field of
beta spectroscopy in 1913. He was killed in action near
Cormicy. • He was the grandfather of physicist
Marian Danysz (1909–1983), son of Jean Casimir. ==References==