Family name Cortner (Cortner 
) , around the world, is a rare cognomen. The surname Cortner is habitual in the United States, where it is a rare surname, Canada, where it is a very rare surname, and New Zealand. In absolute terms, it is the most numerous in the United States, Germany, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Cortner | Germany, Malaysia, United States, Canada, New Zealand |
| bob cortner racecar driver, US (b. 1927) |
|