It's possible that:
* The name is misspelled: Double-check the spelling and try searching again.
* The person is relatively unknown: They might be a local figure or someone who hasn't been documented extensively.
* The information is unavailable: There might be no readily accessible information about their death date.
Could you provide any additional context, like a profession, location, or a time period they might have lived in? This might help me find the information you're looking for.