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Last name Kostelac (Kostelac ) , all around the world, is quite a rare cognomen. The family name Kostelac is habitual in Croatia, where it is quite a common surname, Slovenia, where it is quite a rare surname, and Czechia, where it is a rare surname. Measured by absolute frequency, the name is most common in Croatia, the United States, and Czechia.
VARIANT | COUNTRY |
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Kostelac | Austria, Czechia, United States, Croatia, Slovenia |