Gibbs: Leroy Jethro Gibbs

McGee: Timothy McGee, no middle initial (Angel of Death)

Tony: Anthony D. DiNozzo (Frame Up)

Abby: Abgail B. Scuito - Accoding to Abbyforever on NFA:
"But Abby's one is great. According to Pauley Perrette and CBS, her name is Abigail B. Sciuto. No idea what the B stands for, but that makes her initials ABS, which is her nickname. I have written in fics that it stands for Beth but I have no idea what her middle name is."

Ducky: Donald P. Mallard. from JAGfanatic Jainie on NFA "per CBS Character Profiles: Donald P. Mallard" but the CBS character profiles can be sus. See the CBS Profile here. Note Don Belisario's name is Donald P. Belisario.

Ziva: Ziva Cario David: from smackalicious on NFA:"So, I was just playing NCIS Trivia on facebook (soooooo addicting & I really need to go to bed, omg) & I found out that Ziva does indeed have a middle name - well, according to the question I answered, she does. If the question is correct, it is Caria, I believe it said."



Ton'y middle initial from Frame Up.