Cognomen Kieljan (Kieljan 
) , around the globe, is a very rare family name. The surname Kieljan is habitual in Poland, where it is a rare surname, Canada, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. More prevalently, Kieljan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kieljan | United Kingdom, United States, Poland, Canada |
| stanisław kieljan PL (b. 1907) |
|