The origin of the eight auspicious can be traced back to the Indian Buddhist scriptures in Sanskrit or Pali. There is a saying in traditional Buddhism: the "eight auspicious signs" represent the offerings made to him by the Vedics (one of the ancient Indian religions and many gods)
The Eight Auspicious Symbols of Tibetan Buddhism
1. The Eternal or Endless Knot
2. The Treasure Vase
3. The Lotus Flower
4. The Two Golden Fish
5. The Parasol
6. The Conch Shell
7. The Victory Banner
8. The Dharma Wheel