Kia Rae discusses traditionally lucky symbols and how they came to be seen as lucky.

https://www.britannica.com/art/leprechaun

https://www.trafalgar.com/real-word/history-of-leprechauns-trickster-fairies/#:~:text=Lucky%20Symbols,they%20remain%20so%20popular%20today

https://metro.co.uk/2016/03/17/st-patricks-day-2016-the-difference-between-a-shamrock-and-a-four-leaf-clover-5758043/