David Klein was born in Ardo, Czechoslovakia, 1910 to Yaakov and Khani. Prior to WWII he lived in Ardo, Czechoslovakia. During the war he was in Camp,Hungary, Hungary. David survived the Shoah.
Jews deported to or imprisoned in camps, ghettos or forced labor frameworks, who were in hiding, in clandestinity or resistance formations, or suffered relentless persecution under antisemitic legislation in territories controlled by the Nazis or their allies, and were alive by the end of 1945 are considered Shoah survivors.