Alanis Morissette appeared on a new episode of PBS’ Finding Your Roots where she discovered her great-uncles, Gyorgy and Sandor Feuerstein, died in the Holocaust.

Morissette was already aware that her Hungarian Jewish grandfather, Imre Feuerstein, survived the Holocaust before relocating his family – including Morissette’s six-year-old mother – from the Soviet Union to Ontario, Canada in 1953. Following the trauma of the Holocaust, the family decided to hide their Jewish identity, something Morissette only learned of when she was 28 years old.

“I think there was a terror that is in their bones, and they were being protective of us and not wanting antisemitism,” Morissette said. “They were protecting us, keeping us in the dark around it.”

The Finding Your Roots team revealed that Gyorgy and Sandor Feuerstein died while working in a slave labor army.

“It’s unfathomable for me,” Morissette said. “It’s interesting because when my mom watches the news [about war in Ukraine], my immediate thought was [her] trauma with her escape,” she added. “But now hearing this, it’s a whole other level.”

Watch Morissette’s segment below.