Family name Seifert-Wang (Seifert-Wang 
) , all around the world, is an extremely rare cognomen. The family name Seifert-Wang 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 Seifert, and a last name Wang.
| VARIANT | COUNTRY |
|---|---|
| Seifert-Wang | United States |