Here's why:
* No Official List: There's no official database or ranking system that defines "famous" and tracks the number of people with a specific name who achieve that level of recognition.
* Varying Fame: Fame can be measured in different ways (acting, music, sports, etc.) and can range from global superstardom to niche recognition in a particular field.
* Changing Times: Fame is fluid. Someone who was famous in the past might not be as well-known today.
However, you can explore this topic:
* List Websites: Websites like IMDb, Wikipedia, and even Google searches can help you find lists of famous Rebeccas in different categories.
* Specific Fields: Focus your search on a particular field you're interested in, like "famous actresses named Rebecca" or "famous singers named Rebecca."
Remember, it's more about identifying individuals you personally consider "famous" than finding a definitive count.