Stith Thompson
![Stith Thompson](https://upload.wikimedia.org/wikipedia/en/thumb/6/6c/Stith_Thompson.jpg/150px-Stith_Thompson.jpg)
He is the "Thompson" of the Aarne–Thompson–Uther Index, which indexes folktales by type, and the author of the ''Motif-Index of Folk-Literature'', a resource for folklorists that indexes motifs, granular elements of folklore. Provided by Wikipedia