Surname ทิฐิ (Thithi 
, Thiti , ทิฐิ ) , around the world, is quite a rare family name. The family name ทิฐิ is characteristic of Myanmar, where it is a rare surname, South Africa, and Bangladesh, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Myanmar, South Africa, and India. More frequently, ทิฐิ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thiti, Thithi | Myanmar, South Africa, Indonesia, India, Thailand |
| ทิฐิ | Thailand |
| Thithit | Myanmar |
ภคพัฒนะ, ตองเขียว, บุญกอน, and หลิมศิริวงศ์