In the entire world, Костадин (Костадин 
, Kostadin 
, Kostadine 
) is a common boy's forename. The first name Костадин is habitual in Bulgaria, where it is a common male name, North Macedonia, where it is quite a common masculine name, and Greece, where it is quite a rare male name. Likewise, Костадин is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Костадин | Russia, Bulgaria, Ukraine |
| Kostadin | Serbia, Bulgaria, Greece, Romania, North Macedonia |
| Kostadine | United States |
Constantine, Konstantin, Канстанцін, Константин, Костянтин, قسطنطين, and كونستانتين
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костадин хасърджиев BG (b. 1861) |
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костадин халачев BG (b. 1861) |
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костадин попташев BG (b. 1864) |
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| костадин любинов bulgarian revolutionary, BG (b. 1825) |
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костадин молеров BG (b. 1876) |
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костадин бояджиев BG (b. 1880) |
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костадин самарџиев MK (b. 1884) |
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| костадин ангелов BG (b. 1835) |
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| костадин чилев BG (b. 1836) |
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| костадин попстоянов BG (b. 1836) |
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костадин титянов BG (b. 1892) |
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| костадин брадински BG (b. 1847) |
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костадин горбанов BG (b. 1900) |
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| костадин костов BG (b. 1850) |
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| костадин чучулайн Bulgarian revolutionary, teacher and priest, BG (b. 1861) |
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