Triskele & Triskelion
https://www.nms.ac.uk/explore-our-collections/games/discover-the-picts/
http://www.ninniradicini.it/articoli/trinacria_sicily_history_mythology.htm
For my story, I would go further to say that the symbol also means:
- three-veined
- three-armed
- three-souled
- three-legged
- triple-goddess
- tri-une (three-in-one)