The first known use of triskaidekaphobia was circa 1909.

What is the history of triskaidekaphobia?

The origins of this fear are unknown but may be connected to the arrest of the Knights Templar on Friday, October 13, 1307. Many cultures have traditions of unlucky numbers other than 13. These beliefs, like our fear of 13, are typically rooted in ancient events that were somehow connected with the number in question.

Who discovered triskaidekaphobia?

Triskaidekaphobia is the fear of 13, a number commonly associated with bad luck in Western culture. While fear of the number 13 can be traced back to medieval times, the word triskaidekaphobia itself is of recent vintage, having been first coined by Coriat (1911; Simpson and Weiner 1992).