Last name Terstenjak (Terstenjak 
) , all over the world, is a very rare family name. The cognomen Terstenjak is characteristic of Croatia, where it is a rare surname, Austria, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Terstenjak | Austria, United States, Croatia |
| davorin terstenjak (b. 1817) |
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| nick terstenjak American taekwondoin, US (b. 1969) |
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