Thanwa Suriyajak is an actor, model and singer, born and raised in in Pakse, Champasak, Laos. He was named "Thanwa" for his birth month December, which is "Thanwakhom" in Thai. His father is of Thai, Chinese, & French descent and his mother is of Thai, Chinese, & Vietnamese descent; they also have relatives residing in Ubon Ratchatanee and Bangkok, Thailand. Having decided to come to Thailand to work and study, he was scouted into Thai entertainment business by the famous Suppachai Sriwijit talent agents.

Thanwa graduated with a Bachelors degree in Communication Arts majoring Film and Video production from Rangsit University, Thailand in 2015 and received a scholarship to continue to study a Master's degree in Film production at the same university. Thanwa is currently dating fellow actress Green Ausadaporn Siriwattanakul, who was his co-star in the drama Koo Prab Chabab Hua Jai.