Family name Östby (Östby 
) , all around the world, is a rare surname. The last name Östby is characteristic of Sweden, where it is quite a rare surname, and Germany, where it is an extremely rare surname.
| anders andersson i östby SE (b. 1771) |
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| anders östby (b. 1893) |
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| jonas östby researcher (ORCID 0000-0002-1381-8384) |
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| caroline östby Norwegian association football player (b. 1992) |
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