Last name Agter (Agter 
) , all around the world, is a very rare family name. The cognomen Agter is habitual in Netherlands, where it is a rare surname, and Canada, where it is an extremely rare surname. Much less frequently, Agter is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Agter | Netherlands, Canada, India, South Africa |