Perec was born the only son of Icek Judko and Cyrla (Schulewicz) Peretz – Polish Jews who had emigrated to France in the 1920s – in a working-class district of Paris. He was a distant relative of the Yiddish writer Isaac Leib Peretz. Perec's father, who enlisted in the French Army during World War II, died in 1940 from unattended gunfire or shrapnel wounds, and Perec's mother perished in the Nazi Holocaust, probably in Auschwitz after 1943. Perec was taken into the care of his paternal aunt and uncle in 1942, and in 1945 he was formally adopted by them.