"Ed McBain" is one of the pen names of American author and screenwriter Salvatore Albert Lombino (1926-2005), who legally adopted the name
Evan Hunter
in 1952.
While successful and well known as Evan Hunter, he was even better known as Ed McBain, a name he used for most of his crime fiction, beginning in 1956.
He also used the pen names John Abbott, Curt Cannon, Hunt Collins, Ezra Hannon, Dean Hudson, Evan Hunter, and Richard Marsten.