Last name Gelsey (Gelsey 
) , around the globe, is a rare family name. The last name Gelsey is characteristic of Austria, where it is a rare surname, the United States, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Also, Gelsey is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gelsey | Philippines, United Kingdom, Austria, China, United States |
| erwin s. gelsey American screenwriter, US (b. 1900) |
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| vilmos gelsey Hungarian-British economist (1921–2021), GB (b. 1921) |
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| andrew harris gelsey Ph.D. Yale University 1990 |
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