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Ruth Greenglass

1924 – 2008

American spy for the Soviet Union

Spy
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About Ruth Greenglass

Lived 1924 – 2008 (aged 83). Ruth Greenglass was an American spy.

Ruth Leah Greenglass (née Printz; April 30, 1924 – April 7, 2008) was an American citizen who acted as a spy for the Soviet Union along with her husband, David Greenglass.

Early life

Ruth Leah Printz was born to a Jewish family on April 30, 1924, in New York City to Max Printz and Tillie Leiter.

David wrote to his wife, "My darling, I most certainly will be glad to be part of the community project (espionage) that Julius and his friends (the Russians) have in mind."

After her husband was drafted and inducted into the Army in 1943, Ruth continued to visit him. In November 1944, she visited him in Albuquerque, New Mexico, where he was working as a machinist on the Manhattan Project at Los Alamos. During that visit, she asked him to forward any information on the project to his brother-in-law, Julius.

Rosenberg trial When the FBI questioned him about suspected espionage activities, David agreed to confess to his activities and to testify against Julius and Ethel Rosenberg in exchange for immunity for his wife so that she could remain at home with their two children.

At the trial, Ruth implicated Ethel in the espionage ring by testifying that Ethel had typed the notes that David had provided. Ruth testified that both Rosenbergs had urged her to persuade her husband to become involved in espionage. Ruth's testimony was crucial in securing Ethel's conviction.

Later life She rejoined her husband after his release from prison in 1960, and they lived in New York City under assumed names with their children.

Reliability The truth of Ruth Printz Greenglass's testimony at the Rosenberg trial has been questioned.

In September 2008, her grand jury transcripts were released and showed that when testifying before the grand jury in August 1950, she was asked, "Didn't you write the information down on a piece of paper?" She replied, "Yes, I wrote the information down on a piece of paper and Julius Rosenberg took it with him."

At the trial, she testified that Ethel had typed the notes about the atomic bomb.

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Important facts

Birth century
Occupation
Spy
Nationality
Also known as
Ruth Leah Greenglass

Family & relationships

Spouse
David Greenglass

People in Ruth Greenglass's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped Ruth Greenglass's

Frequently asked questions

Who was Ruth Greenglass?

American spy for the Soviet Union (1924-2008)

When was Ruth Greenglass born?

Ruth Greenglass was born on 30 April 1924 in New York City.

When did Ruth Greenglass die?

Ruth Greenglass died on 7 April 2008 in New York City.

What was Ruth Greenglass's occupation?

Ruth Greenglass was a spy.

What nationality was Ruth Greenglass?

Ruth Greenglass was American.

Sources & further reading

· Wikipedia: Ruth Greenglass

· Wikidata: Q3453621

· DBpedia: Ruth Greenglass

Cite this page

APA: Biography.guide. (2026). Ruth Greenglass. https://biography.guide/ruth-greenglass/

MLA: "Ruth Greenglass." Biography.guide, https://biography.guide/ruth-greenglass/.

Chicago: "Ruth Greenglass." Biography.guide. https://biography.guide/ruth-greenglass/.

Data last updated: 2026-09-21 · Spot an error? Report a correction.

Portrait: Wikimedia Commons · author & licence

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