Last name Sagan (Sagan 
, サガン 
, Саган 
) , worldwide, is a common family name. The surname Sagan is characteristic of Eastern Europe, particularly Ukraine, where it is quite a rare surname, Poland, and Slovakia. Not in comparison with a country's population, the name is most common in Ukraine, Poland, and the United States. Also, Sagan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sagan | Slovakia, Philippines, United States, Poland, India |
| サガン | Japan |
| Саган | Kyrgyzstan, Russia, Belarus, Kazakhstan, Ukraine |
| سيغان | Iran |
Saganowska, Saganowski, Sagán, Sağan, Çagan, Çağan, Сагань, זגן, and ساجان
| anna of sagan (1350-1405) (b. 1350) |
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| anna of sagan Consort of Charles I of Münsterberg-Oels (b. 1450) |
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| margareta of sagan Countess Bánffy de Alsólendva (b. 1469) |
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wilhelmine von sagan Duchess of Sagan, DE (b. 1781) |
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pauline von sagan Princess of Courland, DE (b. 1782) |
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leontine sagan Austrian-Hungarian stage and film director, ZA (b. 1889) |
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eufrozyn sagan Polish botanist (1916-1995), PL (b. 1916) |
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| moses sagan holocaust victim, b. 1882-07-19, DE (b. 1882) |
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| klara sagan holocaust victim, b. 1883-07-07, DE (b. 1883) |
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carl edward sagan American astrophysicist, cosmologist and author (1934–1996), US (b. 1934) |
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françoise sagan French writer, FR (b. 1935) |
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jacob dungau sagan Malaysian politician, MY (b. 1946) |
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| szachno sagan PL (b. 1892) |
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bruce sagan American mathematician, US (b. 1954) |
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scott sagan American political scientist, US (b. 1955) |
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