Marion Wiesel, who translated many books written by her husband, Elie Wiesel, including the final edition of his magnum opus, “Night,” and who encouraged him to pursue a wide-ranging public career, helping him become the most renowned interpreter of the Holocaust, died on Sunday at her home in Greenwich, Conn. She was 94.

Her death was confirmed by their son, Elisha Wiesel.

The Wiesels met in the late 1960s and married in 1969. By then, Mr. Wiesel had already achieved wide acclaim. “Night” — a memoir about his teenage experience at Auschwitz and a tortured spiritual reckoning about the meaning of the Holocaust — came out in 1960, originally translated from the French by Stella Rodway.

Mr. Wiesel’s Nobel Peace Prize and his numerous encounters with world leaders still lay decades away. Friends, relatives and writers all attributed the moral stature he achieved partly to the quiet influence of Marion.

“In the alignment of stars that helped make Wiesel the international icon he became, his marriage to Marion was among the most significant,” Joseph Berger wrote in “Elie Wiesel: Confronting the Silence” (2023), a biography.

By nature, Mr. Wiesel was a reader of literature, a chess player and an observer of Jewish rituals. Into his early 40s, he led the intense but unworldly life of a passionate intellectual. For days he might not sleep. He often forgot to eat meals. He abstained from alcohol. He took trips abroad without notice and could not be reached.