A is for Almack, an Ensign who served on the NX-01 and nearly froze his buns off.
B is for Barrows, Yeoman Tonia. From TOS.
C is for Colt, Yeoman J.M. Also from TOS.
D is for Darson of the USS Adelphi.
E is for Esteban, Captain J.T. of the USS Grissom.
F is for Finnegan, Jim Kirk's academy nemesis.
G is for Garrovick, captain of the Farragut
H is for Harriman, ineffective Captain of the Enteprise B
I is for Irina Galliulin, who never finished her academy training
J is for Jellico, Captain Edward of the USS Cairo, and---temporarily---the USS Enterprise-D.
K is for Kyle, Lt. and Transporter Chief.