He was the striker who is the all-time top goalscorer of the national team with his 55 goals.
From the past to the present, Niwat was mentioned in dispatches as the legend striker of Thailand national football team.
[1] Niwat is the half-brother of Daoyod Dara who was also a footballer for Thailand national team.
He is the stepson the former South Vietnam national football team player Nguyễn Văn Đức who married his mother in the 1950s and gave birth to Daoyod.
Văn Đức later changed his name to Duan Dara after his naturalization to become a Thai citizen.