Cognomen มหาดี (Mahadi 
, Mahady 
, Mahadee 
) , across the world, is a common family name. The cognomen มหาดี is characteristic of Brunei, where it is quite a common surname, Malaysia, and Sudan. In absolute terms, this name is the most popular in Bangladesh, Malaysia, and Nigeria. Likewise, มหาดี is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mahadi | Indonesia, Sudan, Malaysia, Nigeria, Bangladesh |
| Mahady | Indonesia, South Africa, Sudan, Malaysia, Bangladesh |
| Mahadee | Malaysia, Philippines, Nigeria, India, Bangladesh |
| มหาดี | Thailand |