It's possible there are:
* A lesser-known actor: Perhaps someone with this name has had smaller roles or worked on independent projects.
* A name misspelling: The name might be similar to someone else's, and you might have a typo.
To help find the correct person, please provide:
* More information: Do you have any other details about Nando Martellini, like their role in a specific film/TV show, or the year of the project?
* Confirmation: Are you sure you're looking for the right name?
With more details, I might be able to assist you in finding the correct information.