Family name Герхардт (Gerhardt 
, Gerkhardt 
, Герхардт 
) , in all the world, is a common cognomen. The surname Герхардт is habitual in Germany, where it is quite a common surname, Denmark, where it is quite a rare surname, and Hungary. In absolute terms, it most frequently occurs in Germany, the United States, and Brazil. Much less frequently, Герхардт is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gerhardt | Brazil, Canada, South Africa, United States, Germany |
| Gerkhardt | Brazil, Spain, United Kingdom, United States, Germany |
| Герхардт | Russia, Ukraine |