Children and grandchildren of Auschwitz survivors are memorializing the darkest days of history on their own bodies.

When Eli Sagir showed her grandfather, Yosef Diamant, the new tattoo on her left forearm, he bent his head to kiss it.

Mr. Diamant had the same tattoo, the number 157622, permanently inked on his own arm by the Nazis at Auschwitz. Nearly 70 years later, Ms. Sagir got hers at a hip tattoo parlor downtown after a high school trip to Poland. The next week, her mother and brother also had the six digits inscribed onto their forearms. This month, her uncle followed suit.

“All my generation knows nothing about the Holocaust,” said Ms. Sagir, 21, who has had the tattoo for four years. “You talk with people and they think it’s like the Exodus from Egypt, ancient history. I decided to do it to remind my generation: I want to tell them my grandfather’s story and the Holocaust story.”

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