Cognomen Kreja (Kreja 
) , throughout the world, is a rare last name. The family name Kreja is characteristic of Poland, where it is a rare surname, Germany, where it is a very rare surname, and France. Also, Kreja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kreja | Germany, India, United States, Poland, France |
| bogusław kreja Polish linguist, PL (b. 1931) |
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| ludwik kreja Polish chemist, PL (b. 1935) |
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| ireneusz kreja Polish engineer, PL (b. 1955) |
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