In 1891, Kennard Novelty Company, makers of the first commercial talking board, needed a name for their product, so they asked the board to name itself. Smithsonian's Linda Rodriguez McRobbie looks at "The Strange and Mysterious History of the Ouija Board." Above, my favorite Ouija Board moment in film. From Smithsonian:
Contrary to popular belief, "Ouija" is not a combination of the French for "yes," oui, and the German ja. (Ouija historian Robert) Murch says, based on his research, it was (Kennard Novelty Company co-founder) Elijah Bond's sister-in-law, Helen Peters (who was, Bond said, a "strong medium"), who supplied the now instantly recognizable handle. Sitting around the table, they asked the board what they should call it; the name "Ouija" came through and, when they asked what that meant, the board replied, "Good luck." Eerie and cryptic—but for the fact that Peters acknowledged that she was wearing a locket bearing the picture of a woman, the name "Ouija" above her head. That's the story that emerged from the Ouija founders' letters; it's very possible that the woman in the locket was famous author and popular women's rights activist Ouida, whom Peters admired, and that "Ouija" was just a misreading of that.