The only two I can think of are:
Councillor Troy (The Next Generation). (She held a starfleet commission of Lieutenant Commander).
Lieutenant Commander Tuvok (Voyager).
I hope one of them is the one you where thinking of.
Sulu .
Lt. Commander Data is a Soong-type sentient android who served aboard the U.S.S. Enterprise, NCC-1701 D, a Galaxy Class Starship of the Federation. He was played by Brent Spiner.
Lieutenant Worf is played by Michael Dorn.
Captain James T. Kirk had many crewmates Spock, Montgomery "Scotty" Scott, Pavel Chekov, Leonard "Bones" McCoy, Nyota Uhura, Hikaru Sulu & more but the ones mentioned are his main crewmates.
Tarik Ergin plays the role of Lieutenant Junior Grade Ayala .
Uhura
Sulu .
In star trek the next generation, Brent spiner played lieutenant commander Data.
If you are referring to Lieutenant Commander Uhura (the Swahii communications officer), her full name is Nyota Uhura.
No. Lieutenant commander is an O-4, the equivalent of Major in the other branches. A commander is O-5, same as a lieutenant colonel in the other branches. Equivalent ranks, navy given first: O-1 Ensign - Second Lieutenant O-2 Lieutenant junior grade - First Lieutenant O-3 Lieutenant - Captain O-4 Lieutenant commander - Major O-5 Commander - Lieutenant colonel O-6 Captain - Colonel O-7 Rear admiral, lower half - Brigadier general O-8 Rear admiral, upper half - Major general O-9 Vice Admiral - Lieutenant general O-10 Admiral - General O-11 there have only been ten officers of this rank, all WWII commanders - Admiral of the Fleet - General of the Army Some claim that General Pershing and George Washington (by posthumous congressional action) held six-star rank, as General of the Armies. During Washington's service he was a Lieutenant general.
Lt. Commander Data is a Soong-type sentient android who served aboard the U.S.S. Enterprise, NCC-1701 D, a Galaxy Class Starship of the Federation. He was played by Brent Spiner.
star doll
Startled and starfish.
In the US Army: 2nd Lieutenant (Butter Bar) 1st Lieutenant Captain Major Lieutenant Colonel (Light Bird) Colonel (Full Bird) Brigadier General (1 Star) Major General (2 Star) Lieutenant General (3 Star) General (4 Star)
Vega
no one he is a commander
Uhura