| Duff - ARKANSAS |
Duffau - TEXAS |
Duffryn Mawr - PENNSYLVANIA |
| Duff - INDIANA |
Duffee - MISSISSIPPI |
Duffy - OHIO |
| Duff - KENTUCKY |
Duffield - COLORADO |
Duffy - WEST VIRGINIA |
| Duff - NEBRASKA |
Duffield - MARYLAND |
Duffy Trailer Court - MONTANA |
| Duff - TENNESSEE |
Duffield - MICHIGAN |
Duford - SOUTH CAROLINA |
| Duff - TEXAS |
Duffield - PENNSYLVANIA |
Dufort - IDAHO |
| Duff City - PENNSYLVANIA |
Duffield - VIRGINIA |
Dufour - CALIFORNIA |
| Duff Creek - NORTH CAROLINA |
Duffields - WEST VIRGINIA |
Dufresne - LOUISIANA |
| Duff Settlement - ALABAMA |
Duffies - NORTH CAROLINA |
Dufur - OREGON |