Throughout the world, Schlieffen (Schlieffen 
) is an extremely rare unknown gender first name. Much more frequently, Schlieffen is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Schlieffen | Germany, United States |
| graf karl von schlieffen 23 Mar 1798 Konigsberg - 10 Dec 1845 Vives-Eaux nr Melun (b. 1798) |
|
|
| martin-ernst julius karl von schlieffen (b. 1859) |
|