Last name พัธโนทัย (พัธโนทัย 
, Phatthanothai ) , around the globe, is a rare surname. The surname พัธโนทัย is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, พัธโนทัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phatthanothai, พัธโนทัย | Thailand |
| สังข์ พัธโนทัย Thai politician, TH (b. 1914) |
|
|
| มั่น พัธโนทัย Thai politician, TH (b. 1941) |
|
|
| วรรณไว พัธโนทัย TH (b. 1942) |
|