Last name Kefalopoulos (Kefalopoulos 
) , across the world, is a rare cognomen. The surname Kefalopoulos is habitual in Greece, where it is quite a rare surname, Germany, where it is a very rare surname, and Canada, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Greece, Germany, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Kefalopoulos | Greece, Germany, Canada, Italy, United States |