Quatorzième is simply French for "fourteenth". A person known as a "Quatorzième" is employed for the express purpose of adding a dinner guest to a dinner party where, without the addition, there would only be thirteen guests.

There is a long-standing superstition that the thirteenth guest (or, alternatively, the first guest to rise from the party of thirteen) is destined for a tragedy. Judas, for example, was the first guest to rise at the thirteen-member Last Supper and the first to die thereafter. In the Norse tradition, Loki the trickster god invited himself to a feast of twelve warriors and, by his presence as the thirteenth guest, brought about the death of Balder, a famed Norse warrior.

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