Question: The Valachi hearings were named after which American gangster and first member of the Mafia to acknowledge it existed?

Context paragraphs:
Wu-Syndicate: Wu-Syndicate is a group from Virginia consisting of Joe Mafia, Napoleon, and Myalansky (who named himself after the gangster Meyer Lansky).  They were originally called Crime Syndicate but changed their name to Wu-Syndicate when they signed to Wu-Tang Records and became Wu-Tang Clan affiliates.  After debuting on the compilation "" in 1998, their self-titled debut album "Wu-Syndicate" was released in 1999 on both Wu-Tang Records and their own label Slot Time Records.  The album was, like most releases from Wu-Tang Clan affiliates during this time enjoyed moderately successful sales with the single "Where Wuz Heaven" going gold.  Soon after the release there was a dispute of an unknown origin between the group and Wu-Tang Records and the group briefly changed their name to The Syndicate until 2009 with eventual reconciliation and the release of their second official album "Grimlenz", produced mostly by Antagonist Dragonspit of Virginia Beach,VA.  Both Myalansky and Napoleon continue to work with Joe Mafia but have refused to work with each other since the release of their first album.  In an interview Napoleon stated that though they have always clashed, "Mya is still my dude though regardless".  The group has maintained ties with various members of the Wu-Tang Family.  Napoleon is currently working on a project with fellow Wu-Tang alumni Solomon Childs, Shaka Amazulu, and Dexter Wiggle called "Illuminati Network".  Joe Mafia released his debut solo album "This One" in 2002 and founded his own label called 58 West Diamond Street Records.  Napoleon released his first solo album, "Kingpin Wit Da Inkpen" in 2007 and a mixtape titled "Mark of the Beast" in 2011.  Myalansky released his first solo album, "Drastic Measures" in 2008 and a mixtape a few years later in 2011 "AMW.Com".  Myalansky has also been working with California rapper Mitchy Slick and has released two more volumes of his "AMW.Com" mixtape series.  In 2013 Myalansky and Joe Mafia featured on the song "Golden Age Rapper" by CHG Unfadable.

Joseph Valachi: Joseph Michael "Joe Cargo" Valachi (September 22, 1904 – April 3, 1971) was an American gangster, notable as the first member of the Italian-American Mafia to publicly acknowledge its existence, and credited with popularization of the term "Cosa Nostra".

Valachi hearings: The Valachi hearings, also known as the McClellan hearings, investigated organized crime activities across America and investigated leading mafia figures of the era such as Sam Giancana of Chicago.  The hearings were initiated by Arkansas Senator John L. McClellan in 1963.  The hearings were named after the major government witness against the American Mafia, Joseph Valachi.

Arthur Max: Arthur Max (born May 1, 1946) is an American production designer.  He has been nominated for three Academy Awards: once for his Production Design work on "Gladiator" (2000), "American Gangster" (2007), and "The Martian" (2015).  In addition to his Oscar nominations, Max won several other honors for his production design on the film, including the BAFTA, the National Board of Review prize and the Broadcast Film Critics honor.  He also collected two "Excellence in Production Design" Award2 from the Art Directors Guild, the first for Gladiator and the second for The Martian.  He was also nominated for "Black Hawk Down", "Robin Hood", "American Gangster", "Prometheus" and "Panic Room".  After "[[The Martian (film), Max worked on [[All The Money In The World]] (2017) marking Max's twelfth project for filmmaker Scott, a list of achievements which includes "[[Exodus: Gods and Kings]]", "[[The Counselor]]", "[[Kingdom of Heaven (film)|Kingdom of Heaven]]", "Robin Hood" and the aforementioned "Black Hawk Down" and "[[Body of Lies (film)|Body of Lies]]".  He designed Fincher's 1995 thriller, "[[Seven (1995 film)|Seven"]]".

Salvatore Cancemi: Salvatore Cancemi (Palermo, March 19, 1942 – January 14, 2011) was a member of the Sicilian Mafia.  He would be the first member of the Sicilian Mafia Commission that turned himself in voluntarily and became a pentito, a collaborator with the Italian judicial authorities.  Cancemi made controversial allegations about the collusion of Prime Minister Silvio Berlusconi and his right-hand man Marcello Dell'Utri with the Mafia, which have not been corroborated.

Grand Hotel des Palmes Mafia meeting 1957: Over four days, between October 12–16, 1957, the American gangster Joseph Bonanno allegedly attended a series of meetings between some high-level Sicilian and American mafiosi in the Grand Hotel des Palmes (Albergo delle Palme) in Palermo, Sicily – the most splendid in town at the time.  The so-called 1957 Palermo Mafia summit has become a legendary landmark in the international illegal heroin trade in popular Mafia non-fiction.  The question is if it ever took place.  The details of it are still shrouded in mystery.  According to some, one of the main topics on the agenda was the organisation of the heroin trade on an international basis.  The FBI believed it was this meeting that established the Bonanno crime family in the heroin trade.

Sam DeCavalcante: Simone Rizzo "Sam" DeCavalcante (March 3, 1912 – February 7, 1997), known as "Sam the Plumber", was a member of the New Jersey Mafia.  Claiming descent from the Italian royal family, DeCavalcante was nicknamed "The Count".  The Kefauver hearings later named his crime family the DeCavalcante crime family since he was the boss of the family current to those hearings.

Mickey Cohen: Meyer Harris "Mickey" Cohen (September 4, 1913 – July 29, 1976) was an American gangster based in Los Angeles and boss of the Cohen crime family.  He also had strong ties to the Italian American Mafia from the 1930s through 1960s.

The Valachi Papers (book): The Valachi Papers is a biography written by Peter Maas, telling the true story of former mafia member Joe Valachi, a low-ranking member of the New York-based Genovese crime family, who was the first ever government witness coming from the American Mafia itself.  His account of his criminal past revealed many previously unknown details of the Mafia.  The book was made into a film ("The Valachi Papers"), released in 1972, starring Charles Bronson as Valachi.

Tommy Lucchese: Thomas "Tommy" Lucchese (pronounced ] ; born Gaetano Lucchese, December 1, 1899 – July 13, 1967) was a Sicilian-born American gangster and founding member of the Mafia in the United States, an offshoot of the "Cosa Nostra" in Sicily.  From 1951 until 1967, he was the boss of the Lucchese crime family, one of the Five Families that dominates organized crime in New York City.

Supporting paragraphs: Valachi hearings Joseph Valachi
Answer: Joseph Michael "Joe Cargo" Valachi