Surname Ivanac (Ivanac 
) , globally, is a rare family name. The cognomen Ivanac is habitual in Croatia, where it is quite a common surname, Uruguay, where it is a rare surname, and Australia. Not in comparison with a country's population, it is the most numerous in Croatia, the United States, and Australia. Very seldom, Ivanac is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ivanac | Uruguay, Australia, Croatia, India, United States |
| ivica ivanac Croatian writer and playwright (1936-1988), HR (b. 1936) |
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| gordana ivanac researcher |
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