A list of personnel on the USS Intrepid (NCC-1631).
Unnamed[]
The entire crew []
The entire four hundred person crew of the Intrepid, all Vulcans, were killed by a giant amoeba in 2268. Spock was able to sense their death throes from afar and knew that none of them had understood what was killing them or would have been able to if they knew what it was.
Later, when Spock suggested that the Intrepid's crew had probably taken all the same measures as the Enterprise, Captain James T. Kirk countered that they might not have, given the illogical nature of their situation. Spock then reiterated that the Vulcan crew didn't know what was killing them, and added that their logic wouldn't have permitted them to even consider that they were being killed in the first place. (TOS: "The Immunity Syndrome")
These Vulcans were only mentioned in dialogue.
Pocket TOS novels gave one of the commanding officers' names as Captain Spiak (β), while the captain in charge at the time of its destruction was Satak (β), a name that was used in an earlier draft of the script.