Globally, Sweyn (斯文 
, Свен 
, Sweyn 
) is quite a common epicene first name. The first name Sweyn is habitual in China, where it is a rare epicene name, and Russia, where it is an extremely rare male name. Very seldom, Sweyn is the last name as well as the forename.
Sweyn is also a name for the fictitious and mythical characters: Sven , character in Jerusalem Delivered; Sven , the fictional Reindeer from Disney's Frozen; Sven Svenson , the fictional character in the 1987–1996 animated Teenage Mutant Ninja Turtles television series, Northern Lights Out; Sven Kjartanson , the fictional character in The Saxon Stories, The Last Kingdom and Sven Bolund , the fictional character in the Bert universe, among other works.
| sweyn haakonsson earl of the house of Hlaðir and co-ruler of Norway (b. 1000) |
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| sweyn godwinson Anglo-Saxon Earl (b. 1020) |
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| sweyn the crusader Danish crusader, TR (b. 1050) |
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| sweyn asleifsson Viking who appears in the Orkneyinga Saga (b. 1115) |
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| sweyn asleiffson Peerage person ID=428568 |
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| sweyn thorsson Peerage person ID=204894 |
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