Starfleet lieutenants junior grade
In the history of Starfleet, there have been many notable officers holding the rank of lieutenant junior grade.

Lieutenants junior grade

A 
Ayala (provisional)

B 
 (2366)
 (2369)

 (2380-2381)

C 

Chandler
Cody
Costa
 (2348)
 (2379)

D 
 (2375)

 (2256)

F

G

I

J 
Jae (2369)

K 
Kagan 
Kayshon
Kimolu

L 
 (2364)

Linus

M 
Marquez 
Martinez
Matt
Monroe
Myers

N 
Nara
Nog

O 
O'Connor
 (2370)

P 

 (2369, alternate timeline)

R 
 (2293)

S 
Saavik (2285)

T 

 (provisional)

U 
 
 Unnamed
 Officer visiting DS9
 USS Enterprise engineer
 USS Grissom helm officer
 USS Voyager sciences officer

V 
Van Mayter

W 

Worf (2364-2365)

Background information 
Only one officer in TOS wore a lieutenant junior grade braid, Tormolen in , even though some officers (for example, Kyle, Leslie, Charlene Masters, and Marla McGivers) were referred to as "lieutenant" in dialogue but wore no rank insignia, which otherwise indicated an ensign or crewman, presenting a number of ambiguities in identifying a character's true rank. Contrarily, the junior engineer encountered aboard the Enterprise in  was described in the script as a "lieutenant, junior grade", but wore the stripes of a full lieutenant.

According to one early draft of  (dated ), Lieutenant Ilia was identified in dialogue as a "lieutenant junior grade".
Lieutenants junior grade