List of unnamed individuals of unspecified eras.
296+ violinists
These violinists were among the three hundred (the others being Tataglia, Heifetz, Menuhin, and Grak-tay) whose musical styles Data was programmed to be able to imitate by 2366. (TNG: "Sarek")
Flint's wives
Flint claimed to have been married for love a hundred times, as of 2269. In his own words, he had "selected, loved, cherished. Caressed a smoothness, inhaled a brief fragrance." Having to lose them all to death prompted him to attempt to make himself an immortal mate, ultimately culminating in the creation of Rayna Kapec. (TOS: "Requiem for Methuselah")
Guinan's marriages
According to Guinan, her husbands all knew she was never good at being confined to quarters. (TNG: "Evolution")
As of 2379, she had married twenty-three times. When asked by Geordi La Forge if she ever though about getting married again, she told him that 23 was her limit. (Star Trek Nemesis)
Temporal agents
According to Crewman Daniels, himself a temporal agent, dozens of temporal agents were stationed throughout the timeline with orders to alter history. He made this claim in Enterprise NX-01's sickbay when he had sent the ship back in time to 1944. (ENT: "Storm Front")
Tyken's crew
Prior to 2367, the crew under the command of Bela Tyken did not suffer from behavioral changes or sleep disturbances while trapped in what would later be referred to as a Tyken's Rift. (TNG: "Night Terrors")