Family name Keller-Hufnagel (Keller-Hufnagel 
) , all around the world, is an extremely rare cognomen. The cognomen Keller-Hufnagel is habitual in Western Europe, particularly Germany, where it is an extremely rare surname. Parts of the name also exists independently as a last name Keller, and a last name Hufnagel.
| VARIANT | COUNTRY |
|---|---|
| Keller-Hufnagel | Germany |