Helen was a figure in Greek mythology, daughter of Zeus, who by her beauty caused the war which destroyed Troy.
In 2267, Trelane referred to Yeoman Teresa Ross of the USS Enterprise as "Fair Helen" and requested that she make him "immortal with a kiss." (TOS: "The Squire of Gothos")
{{bginfo|In the episode "Elaan of Troyius", the name, Elaan of Troyius is a take on Helen of Troy. (citation needed • edit))