Cognomen Platt-Marks (Platt-Marks 
) , throughout the world, is an extremely rare surname. The cognomen Platt-Marks is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Platt, and a last name Marks.
| VARIANT | COUNTRY |
|---|---|
| Platt-Marks | United States |