General terms:
* Folklore Collection: This is the most general term and encompasses a broad range of traditional stories, songs, dances, and beliefs.
* Story Collection: This is a more neutral term that simply indicates a collection of narratives.
More specific terms:
* Mythology: This refers to a collection of stories about gods, goddesses, and heroes, often explaining the origins of the world and its people.
* Legendarium: This term is used for a collection of myths, legends, and stories associated with a specific world or universe, like Tolkien's "Legendarium" for Middle-earth.
* Folklore Anthology: This is a collection of stories from various cultures, often organized by themes or regions.
* Treasury of Tales: This emphasizes the richness and value of the stories within the collection.
* Storybook: This term is often used for children's books containing a selection of stories.
Specific to the genres mentioned:
* Fable Collection: This focuses solely on fables, short stories with a moral lesson.
* Romance Anthology: This focuses solely on romantic tales, often featuring love, adventure, and magical elements.
Ultimately, the best term depends on the specific contents and purpose of the collection.