Question: Cynthia was codename for what American spy?

Context paragraphs:
Spy Kids 3-D: Game Over: Spy Kids 3-D: Game Over (also known as Spy Kids 3: Game Over) is a 2003 American spy adventure comedy film produced, written, shot, composed, edited, and directed by Robert Rodriguez, co-produced by Elizabeth Avellan, Dimension Films and Troublemaker Studios and the third installment in the "Spy Kids" series.  It was released in the United States on July 25, 2003 by Dimension Films.  The film stars Antonio Banderas, Carla Gugino, Alexa Vega, Daryl Sabara, Ricardo Montalbán, Holland Taylor, Mike Judge, Cheech Marin, and Sylvester Stallone.

Spy Kids: Spy Kids (stylized as SPY kids) is a 2001 American spy adventure comedy film written and directed by Robert Rodriguez, produced by Elizabeth Avellan and Rodriguez, and starring Antonio Banderas, Carla Gugino, Alan Cumming, Teri Hatcher, Cheech Marin, Danny Trejo, Robert Patrick, Tony Shalhoub, Alexa Vega, Daryl Sabara, and Mike Judge.  The first installment in the "Spy Kids" film series, the film was theatrically released in the United States on March 30, 2001, by Dimension Films.  It grossed over $147 million worldwide.  Three sequels were released: "" in 2002, "" in 2003, and "" in 2011.

Confessions of a Nazi Spy: Confessions of a Nazi Spy is a 1939 American spy thriller film and the first blatantly anti-Nazi film produced by a major Hollywood studio.  The film stars Edward G. Robinson, Francis Lederer, George Sanders, Paul Lukas, and a large cast of German actors, including some who had emigrated from their country after the rise of Adolf Hitler.  Though the film can be seen as propaganda, it was based on the articles of former FBI agent Leon G. Turrou, who had been active in investigating Nazi spy rings in the United States prior to the war, and lost his position at the Bureau when he published the articles without permission.

Agent Cody Banks: Agent Cody Banks is a 2003 American spy action comedy-thriller film, directed by Harald Zwart.  Its story follows the adventures of the 15-year-old title character, played by Frankie Muniz, who has to finish his chores, avoid getting grounded, and save the world by going undercover for the CIA as a James Bond type superspy.  Hilary Duff, Angie Harmon, Keith David, Cynthia Stevenson, Daniel Roebuck, Darrell Hammond, Ian McShane, and Arnold Vosloo co-star.  The film was filmed in British Columbia.  It was released in the United States on March 14, 2003.

Austin Powers: The Spy Who Shagged Me: Austin Powers: The Spy Who Shagged Me is a 1999 American spy action comedy film and the second installment in the "Austin Powers" series.  It is preceded by the original film, "" (1997) and followed by "Austin Powers in Goldmember" (2002).  The film was directed by Jay Roach, co-written by Mike Myers and screenwriter Michael McCullers, and once again stars Myers as the title character.  Myers also plays Dr. Evil and Fat Bastard.  The film's title is a play on the 1977 James Bond film "The Spy Who Loved Me".

Spy Kids 2: The Island of Lost Dreams: Spy Kids 2: The Island of Lost Dreams (known in-film as Spy Kids 2: Island of Lost Dreams) is a 2002 American spy adventure comedy film written, edited, and directed by Robert Rodriguez, produced by Troublemaker Studios, Elizabeth Avellan, and Rodriguez, and starring Antonio Banderas, Carla Gugino, Alexa Vega, Daryl Sabara, Mike Judge, Ricardo Montalbán, Holland Taylor, Christopher McDonald, Danny Trejo, Cheech Marin, Steve Buscemi, Taylor Momsen, Matt O'Leary, and introducing Emily Osment.

Claire Phillips: Claire Maybelle Snyder (December 2, 1907 – May 22, 1960), also known as Clara Fuentes, Clara Phillips, Dorathy Fuentes as well as High Pockets, was an American spy, entertainer, club owner, and author most noted for her exploits in the Japanese-occupied Philippines.  She was portrayed by Ann Dvorak in the 1951 movie "I Was an American Spy".  She was also the author of "Manila Espionage", a book about her wartime experiences.  In 1951, she was awarded the Medal of Freedom.

Amy Elizabeth Thorpe: Amy Elizabeth "Betty" Thorpe (November 22, 1910 – December 1, 1963) was, according to William Stephenson of British Security Coordination, an American spy, codenamed "Cynthia", who worked for his agency during World War II.  British Security Coordination was a cover organization that had been set up in New York City by the British Secret Intelligence Service (MI6) in May 1940.

KH-11 Kennen: The KH-11 KENNEN, renamed CRYSTAL in 1982 and according to leaked NRO budget documentation currently going by the codename of Evolved Enhanced CRYSTAL (EEC) (but also referenced by the codenames 1010, and "Key Hole"), is a type of reconnaissance satellite first launched by the American National Reconnaissance Office in December 1976.  Manufactured by Lockheed in Sunnyvale, California, the KH-11 was the first American spy satellite to use electro-optical digital imaging, and create a real-time optical observation capability.

William Stephenson: Sir William Samuel Stephenson, CC, MC, DFC (23 January 1897 – 31 January 1989) was a Canadian soldier, airman, businessman, inventor, spymaster, and the senior representative of British Security Coordination (BSC) for the entire western hemisphere during World War II.  He is best known by his wartime intelligence codename Intrepid.  Many people consider him to be one of the real-life inspirations for James Bond.  Ian Fleming himself once wrote, "James Bond is a highly romanticized version of a true spy.  The real thing is ... William Stephenson."

Supporting paragraphs: Amy Elizabeth Thorpe William Stephenson
Answer: Amy Elizabeth "Betty" Thorpe