Family name ビター (Bitter 
, ビター 
) , around the world, is a common surname. The last name ビター is habitual in Antigua and Barbuda, where it is quite a common surname, Germany, where it is quite a rare surname, and Hungary. Measured by absolute frequency, it is the most numerous in Germany, the United States, and India. Much less frequently, ビター is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bitter | Netherlands, Hungary, United States, Germany, India |
| ビター | Japan |