Cognomen Jaroslao (Jaroslao 
) , throughout the world, is an extremely rare family name. The surname Jaroslao is habitual in Latin America and the Caribbean, particularly Argentina, where it is an extremely rare surname. More prevalently, Jaroslao is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jaroslao | Brazil, Argentina |
Okis, Musij, Jiricek, Parfajt, Prchlik, Lataczewski, Starodub, Skobalski, Latacaswski, Michailowsky, Michailousky, and Michailovsky