Family name Костова (Kostova 
, Костова 
) , in the world, is a common surname. The surname Костова is habitual in Bulgaria, where it is a common surname, North Macedonia, where it is quite a common surname, and Greece, where it is quite a rare surname.
| VARIANT | COUNTRY |
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| Kostova | Greece, North Macedonia, Bulgaria, Czechia, United States |
| Костова | Ukraine, Kazakhstan, Belarus, Bulgaria, Russia |
| надежда костова Bulgarian actor, BG (b. 1897) |
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| елена костова Bulgarian actress, BG (b. 1897) |
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ваня костова Bulgarian singer (1957–2021), BG (b. 1957) |
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| севда костова BG (b. 1921) |
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| анастасия костова Bulgarian singer, BG (b. 1935) |
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| слободанка костова MK (b. 1929) |
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| емилия костова Bulgarian politician, BG (b. 1945) |
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| марија костова Macedonian pedagogue, MK (b. 1946) |
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| катя костова BG (b. 1940) |
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галина костова BG (b. 1994) |
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| ирина костова Bulgarian engineer, BG (b. 1959) |
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| ани костова Bulgarian swimmer, BG (b. 1960) |
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| мина костова actor, BG (b. 1973) |
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| росица костова Macedonian cyclist, MK (b. 1981) |
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| зорница костова basketball player (1982-), BG (b. 1982) |
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Мая, Бети, Буба, Бяла, Галя, Гана, Гери, Гина, Поля, Петя, Анка, Пена, Дора, Дена, Дина, Дима, Неда, Нели, Ники, Нина, Ніна, Дона, Анна, Алла, Мита, Ана, Ани, Г-Ца, Зоя, Лиа, Ива, Ева, Тая, Рая, Яна, Кали, Кана, Кари, Ката, Кати, Катя, Кина, Кера, Маги, Мара, Мина, Валя, and Ваня