Last name Дункан (Duncan 
, Dankan 
, Dunkan 
) , in the entire world, is a widespread cognomen. The cognomen Дункан is characteristic of Latin America and the Caribbean, particularly Grenada, where it is a common surname, Saint Vincent and the Grenadines, and Jamaica (explore the name in all countries). In absolute terms, it is the most numerous in the United States, the United Kingdom, and Australia. Likewise, Дункан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Duncan | United Kingdom, Kenya, Australia, Canada, United States |
| Dankan | Tanzania, Nigeria, Canada, United States, Malaysia |
| Dunkan | United Kingdom, South Africa, Canada, United States, New Zealand |
| Дункан | Kyrgyzstan, Ukraine, Russia |