Played by Jeanne Bal
Episode: TOS 006 - The Man Trap
"Wife of archaeologist Robert Crater, Nancy accompanied her husband to planet M-113 in 2261. She was killed roughly three years later by the last surviving, salt-sucking creature native to that planet. The creature used its hypnotic powers to appear to Prof. Crater as Nancy, giving him companionship in return for a steady supply of salt. In 2266, the creature also appeared as Nancy to Leonard McCoy, who had been romantically involved with Nancy ten years prior."
Now that you mention it (and looking at the picture), I think you inadvertently traced Helen Thomas' lineage going forward in time.