* The name is misspelled. Double-check the spelling and see if you can find any variations.
* The individual is not a prominent public figure. Maybe they are a local historian, artist, or someone who hasn't gained widespread recognition.
* You're thinking of someone else. Perhaps you're confusing this name with someone else from a different field.
To help me understand your request better, please provide more context:
* Where did you encounter this name? Was it in a book, a documentary, or online?
* What is your understanding of Percival Tweedie's role or profession? Do you know anything about their field or accomplishments?
With more information, I might be able to provide you with a better answer.