Cognomen Oad (Oad 
) , globally, is quite a rare family name. The family name Oad is characteristic of Estonia, where it is quite a rare surname, Saudi Arabia, and Oman. Not in comparison with a country's population, the name is most common in Pakistan, Saudi Arabia, and India. Very seldom, Oad is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oad | Saudi Arabia, Egypt, Estonia, India, Pakistan |
| jaan oad Estonian painter (1899-1984), EE (b. 1899) |
|
|
| nicolai oad (b. 1918) |
|