Edward Mannix was an American voice actor known for his extensive work in dubbing foreign films and animated series into English, particularly during the 1980s and 1990s. Born on July 26, 1928, in Jersey City, New Jersey, his career was primarily based in Rome and Los Angeles, where he became a prominent figure in the world of English-language adaptation. Beyond his voice work, Mannix was also an author and journalist, having published novels and worked as a stringer for The Ring magazine during his time in Italy.

Mannix's voice acting career was largely defined by his contributions to the English dubs of numerous Italian genre films and Japanese anime. He was arguably best known for being the regular English voice of the popular Italian actor Bud Spencer in many of his films. In the realm of anime, he became a familiar presence through his work with dubbing companies like Streamline Pictures. He often used the pseudonym Cyn Branch for some of his voice roles, particularly in productions like Robotech: The Movie and the Streamline dub of Castle in the Sky.

His anime filmography is extensive and includes notable roles in classic titles. As cited in the example, Mannix provided the English voice for Captain Gideon, the commander of the Andromeda, in the film Farewell to Space Battleship Yamato. Other significant anime voice roles include General T. Jefferson in Golgo 13: The Professional, Uncle Pom in the Streamline Pictures version of Castle in the Sky, and Chamberlain Sakai Hyobo in Ninja Scroll. He also voiced Cabell in Robotech II: The Sentinels and took on roles in projects such as Macross Plus, Wicked City, and Doomed Megalopolis.

Mannix frequently collaborated with a consistent pool of other voice actors and directors working in the English dubbing industry at the time. In his anime work, he was often joined by fellow voice actors such as Michael Forest, Kirk Thornton, and Wendee Lee across multiple productions. In the Italian film industry, he had recurring collaborations with director Enzo G. Castellari. Edward Mannix passed away on August 2, 1995, in Glendale, California, leaving behind a substantial body of work that contributed to the introduction of Japanese animation and Italian cinema to English-speaking audiences.