Surname Loppnow (Loppnow 
) , in all the world, is quite a rare cognomen. The last name Loppnow is habitual in Germany, where it is a rare surname, the United States, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Loppnow | Brazil, Canada, South Africa, United States, Germany |
| glen r loppnow researcher (ORCID 0000-0002-4630-8663) |
|