Cognomen Jarolin (Jarolin 
) , in the world, is a rare last name. The family name Jarolin is characteristic of Paraguay, where it is quite a rare surname, Slovakia, and Czechia, where it is a rare surname. In absolute terms, the name is most common in Paraguay, Slovakia, and Germany. Also, Jarolin is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Jarolin | Paraguay, Slovakia, Argentina, Dominican Republic, Germany |
| josef jarolin German war criminal (1904-1946), DE (b. 1904) |
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| stanley jarolin American politician, US (b. 1933) |
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| kolja jarolin researcher (ORCID 0000-0001-5011-4653) |
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| rené jarolin ice hockey player, SK (b. 1981) |
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