Family name วิทยานิพนธ์ (Theis 
, Thesi 
, วิทยานิพนธ์ 
) , all around the world, is a common surname. The family name วิทยานิพนธ์ is characteristic of Luxembourg, where it is quite a common surname, Germany, and the United States, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and Brazil. Very seldom, วิทยานิพนธ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Theis | Germany, Denmark, United States, France, Brazil |
| Thesi | Germany, Australia, United States, Brazil, Democratic Republic of the Congo |
| วิทยานิพนธ์ | Thailand |
Theiss, Thesisana, Thesmar, Thessen, Thessing, Thesvisal, Wittayanipon, Wittaynipon, and Witthayanipon
ไหลหลัง, and ปาละนันทน์