Last name Jernas (Jernas 
) , in the entire world, is a rare family name. The family name Jernas is habitual in Ireland, where it is a rare surname, Poland, and Norway. In absolute terms, it most frequently occurs in Poland, the United States, and Ireland. More prevalently, Jernas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jernas | Germany, Norway, Ireland, United States, Poland |
| florian jernas (b. 1914) |
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| jerzy jernas Polish film director, PL (b. 1957) |
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| patrycja e jernas researcher |
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