According to old FBI documents, that can be found on the Mary Ferrell Foundation Site, in 1965 Carlo Gambino restructured his crime family a little bit.
Alfred "Big Freddy" Eppolito, who had been a capo and who had been indicted for drugdealing, was demoted to the rank of a soldier. He fell into a deep depression and eventually drunk himself to death. His old crew emerged with Paul Castellano´s.
In 1976, when Castellano took over the Gambino Family, Nino Gaggi inherited this crew.
According to books, FBI documents and sources on the internet these guys were members of the Castellano crew:
"Diamond" Louie Eppolito (died in 1975),
James "Jimmy Clam" Eppolito Sr (murdered in 1979),
Nino Gaggi (became capo in 1976),
Olympio "Lilo" Garafolo (became capo of a seperate crew later on; this crew was eventually led by Jackie "Nose" D´Amico and later by Mickey "Scar" DiLeonardo),
Albert Seru,
Luigi "Lulu" Marciano,
Peter "17" Piacenti (later moved to Ciccone crew),
Gandolfo Sciandra (an uncle of Castellano),
Paulie "Zack" Zaccaria.

In the 70s, these guys were made into Gaggi´s crew:
Greg DePalma (later moved to Zingaro crew),
Roy DeMeo (functiond briefly as an acting capo while Gaggi found himself in troubble with the law),
James "JimJim" Eppolito Jr (murdered in 1979).