Surname Duke-Pratt (Duke-Pratt 
) , throughout the world, is an extremely rare cognomen. The cognomen Duke-Pratt is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Duke, and a last name Pratt.
| VARIANT | COUNTRY |
|---|---|
| Duke-Pratt | United States |