List of unnamed Krenim.
Annorax's wife was one of the reasons Annorax was trying to change time. He explained to Chakotay that the first time he used his temporal ship to eliminate the Krenim's enemy and restore the empire, he also killed fifty million Krenim, including his wife. He spent the next two hundred years trying to undo his mistake and restore his wife's life. After USS Voyager crashed into his temporal ship, destroying it, time was restored, and Annorax was reunited with his wife. (VOY: "Year of Hell, Part II")
Krenim officer #1
Krenim officer #2
Krenim officer #3
Krenim officer #4
The Krenim commandant attacked Voyager as it entered into Zahl space. His vessel was weak and did no damage to Voyager. He hailed her and informed Captain Janeway that the territory Voyager was in was no longer Zahl, but was in dispute. He threatened to destroy Voyager if Janeway did not turn around. Janeway ignored him and was informed by a Zahl official that she had nothing to worry about, that the Zahl defeated the Krenim years ago.
The Krenim commandant returned and accused Janeway of assisting the Zahl and again threatened Voyager. Suddenly a huge energy wave overtook the ships and the Krenim commandant's ship doubled in size and firepower, the Zahl vanished and the commandant fired on Voyager causing damage, forcing Voyager to retreat. (VOY: "Year of Hell")
When the timeline was later altered again, Voyager encountered the commandant when they entered Krenim space. The commandant informed them the region was in dispute and advised they avoid Krenim territory. Captain Janeway thanked him for the warning and Voyager altered course without incident. (VOY: "Year of Hell, Part II")
The Krenim scientist was assimilated by the Borg at some point prior to 2374. His (or her) personality was debating the finer points of temporal physics with Kathryn Janeway while manifested in Seven of Nine. (VOY: "Infinite Regress")