Cognomen اسفندیار (Asfandyar 
, Esfandiar 
, اسفندیار ) , all over the world, is a rare family name. The family name اسفندیار is characteristic of United Arab Emirates, where it is a rare surname, Iran, and Saudi Arabia. Measured by absolute frequency, it most frequently occurs in Pakistan, Iran, and United Arab Emirates. More frequently, اسفندیار is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Asfandyar | Indonesia, United Arab Emirates, Pakistan, United States, Saudi Arabia |
| Esfandiar | Indonesia, Canada, Iran, Germany, United States |
| اسفندیار | Iran |
| بهاءالدین محمد بن حسن بن اسفندیار 13th century Iranian historian, IR (b. 1210) |
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امیرحسین اسفندیار Iranian volleyball player, IR (b. 1999) |
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