Oleydong Sithsamerchai is well known as a Thai professional boxer, who came to prominence as the former WBC Strawweight World champion in 2007. Throughout his career, he has garnered a numerous titles such as WBC Minimumweight Title, WBC International Silver Super Flyweight Title. Notably, he also became Thailand Southern's first world boxing champion.
Oleydong Sithsamerchai was born in Trang, Thailand. He started boxing at the age of 7 in Bangkok. Under the instruction of his manager W. Ratanawong, Oleydong hit spotlight when becoming WBC Youth World Minimumweight Title.
After dating for more than 10 years, Oleydong was married to a woman, called ไอติม. The two has one son together.