In all the world, Ostoja (Ostoja 
, Остоя 
) is a rare masculine first name. The first name Ostoja is habitual in Bosnia and Herzegovina, where it is quite a rare male name, Croatia, and Austria, where it is a rare boy's name. Very seldom, Ostoja is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ostoja | Bosnia and Herzegovina, Serbia, Poland, United States, Croatia |
| Остоя | Russia, Ukraine |
| ostoja of bosnia King of Bosnia (b. 1378) |
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| ostoja roguski BR (b. 1883) |
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| ostoja mrkojević Serbian painter |
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| ostoja steve vucic |
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| ostoja spuž |
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Ewa, Krstic, Pejcic, Ristic, Guzvic, Tomich, Čenić, Marusic, Popovic, Trkulja, Vucetic, Ostojic, Markovic, Krystyna, Knezevic, Nikolić, Ivanovic, Mitrović, Stankovic, Jovanovic, Mijailovic, Jovanović, Kostic, Todorović, Bubulj, Cvijic, Matic, Misic, Saric, Savic, Cosic, Bajic, Busić, Radic, Rosic, Rikic, Dacic, Gajic, Lazic, Jelic, Nedic, Vucic, Irena, Mandic, Stanic, Strbac, Stijak, Bajić, and Trifunovic