Brothers; Carlo and Paul Gambino

Carlo's sons, the brothers; Thomas, Joseph and Carl Gambino

The DiPalermo brothers aka The Kings of Babania.

Joseph "Joey Beck" DiPalermo
Peter '"Petey Beck'" DiPalermo 
Charles ''Charlie Brody'' DiPalermo

Definitely! lol

Vito “Don Vitone” Genovese, and his brother, Michael “Goombah Mike” Genovese

Lucchese capo Paul “Paulie Ham” Correale, and his brother, soldier Jimmy “Jimmy Ham” Correale.

Lucchese consigliere, Vincent Rao, and his brother, soldier Charlie Rao.

Longtime Lucchese Family associate, Harry “Little Gangy” Davidoff, and his mobster brothers.

The legendary Acting Boss/Consigliere Francesco Saverio (Frank Costello) Castiglia, and his brother, soldier Eduardo (Eddie Costello) Castiglia

Giuseppe “Joe Adonis” Doto, and his brother, Family associate and restauranteur, Anthony “Tony Adonis” Doto

Bonanno acting boss, Gaspare DiGregorio, and his brother, soldier Matteo (Marty) DiGregorio

Stefano and Vito La Salle, or La Sala (TN). Top-ranked early members of what later became the Lucchese Family

Albert and Anthony Anastasia (Anastasio).

Good one. I think Albert and Tony had a few other brothers who were also involved. One was named Jerry I think.

John, Joe and Sal Gambino

Tony and Martin Accardo. Martin was allegedly also a made member of the Outfit.

Marshall Caifano and Leonard Caifano

Outfit soldiers, and brothers, Fiore (Fifi) Buccieri and Frank (The Horse) Buccieri

Outfit capo, Angelo (The Hook) LaPietra, and his brother, soldier James (Jimmy the Lapper) LaPietra

Brooklyn-based DeCavalcante Family brothers/soldiers Angelo and Umberto Gallo

Bonanno Family capo Louis “Louie Ha-Ha" Attanasio, and his brother, soldier Robert “Big Bobby” Attanasio

Pasquale “Patty Ryan” Eboli, brother of Genovese front boss, Thomas "Tommy Ryan" Eboli.

Capo Frank “Big Frank” Cocchiaro, and his brother, soldier Carmelo “Milio” Cocchiaro

DeCavalcante acting boss, Vincent “Vinny Ocean” Palermo, and his brother, Colombo Soldier Pasquale “Junior” Palermo.

Colombo Soldier Anthony “Fat Tony” Peraino, and his brother, soldier Joseph “The Whale” Peraino

Bonanno capo, Joseph Chilli, and his brother, soldier Gerald “Jerry” Chilli

Bonanno soldier Pasquale “Patty Boxcars” Cosoleto, and his son, future Bonanno soldier, Peter “Petey Boxcars” Cosoleto

DeCavalcante Family brothers, soldiers John Riggi Jr., Vincent Riggi, and Emanuel Riggi

All Outfit soldiers and associates:

The Liscandrella brothers; soldiers Frank (Hotdog), Joseph (Ruffy), and Samuel (Sperry).

Nut job ‘juice loan’ kingpin, Samuel (Mad Sam) DeStefano, and his brother, Mario DeStefano

Outfit members, Daniel and John Lardino

“associates” and brothers, Nenos Solomon and Nimrod Solomon

Anthony and Vito Spillone