Last name 智真 (智真 
, Ippen 
) , around the world, is a rare cognomen. The last name 智真 is characteristic of Western Europe, particularly Germany, where it is a rare surname, Austria, and Netherlands, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Germany, China, and the United States. Likewise, 智真 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 智真 | China |
| Ippen | Austria, Germany, United States, India, Netherlands |