It's possible that:
* The name is misspelled: Perhaps you meant a different name? Double check the spelling.
* The person is not widely known: There might be actors with this name who have worked on smaller or independent projects.
* The person is not in the entertainment industry: The name might belong to someone in a different profession.
If you have more information, like a specific role or project they were involved in, it might be easier to find them.