Cognomen ประดิฐ (Pradit 
, Pradith 
, ประดิฐ ) , all over the world, is quite a rare last name. The cognomen ประดิฐ is characteristic of South-eastern Asia, particularly Laos, where it is quite a common surname, Thailand, where it is quite a rare surname, and Malaysia, where it is a rare surname. Measured by absolute frequency, this name is the most popular in South-eastern Asia, particularly Thailand, Laos, and Indonesia. Likewise, ประดิฐ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pradit | Indonesia, Myanmar, India, Thailand, United States |
| Pradith | Laos, India, Malaysia, Thailand, United States |
| ประดิฐ | Thailand |
สวงษ์ตระกูล, มัตนามะ, ใจเรือง, ชาลีสี, เภสัชชะ, ครุฑนอก, โกมลกาญจน, ปัญญาดี, ภูมิเรศสุนทร, and สุวรรณราษฎ