* The name is misspelled: There might be a similar name, a slight variation, or a different spelling of the name that you're looking for.
* The individual is not publicly known: They may be involved in smaller productions or behind-the-scenes roles that don't have widespread recognition.
* The individual is not an actor: The name might belong to someone involved in a different aspect of the film or television industry.
If you have more information about Roger Blin, like their potential role or any other details, it could help narrow down the search.