Surname Zagaja (Zagaja 
) , worldwide, is a rare last name. The surname Zagaja is habitual in Poland, where it is a rare surname, Colombia, where it is a very rare surname, and the United States. Also, Zagaja is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Zagaja | Colombia, Canada, Argentina, Poland, United States |
| stanisław zagaja pomologist, grower of orchard plants (1925-2004), PL (b. 1925) |
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| mirosław zagaja Polish entomologist, PL |
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| gregory p zagaja researcher |
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| anna zagaja researcher |
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| jakub zagaja Polish sportsperson, PL (b. 1982) |
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