Cognomen Gelso (Gelso 
) , all around the world, is quite a rare family name. The surname Gelso is characteristic of Italy, where it is a rare surname, Argentina, and Switzerland. Not in comparison with a country's population, the name is most common in Italy, Argentina, and the United States. Likewise, Gelso is the forename as well as the last name.
| gelso vazzoler brazilian naturalist, researcher and university teacher (1929-1987), BR (b. 1929) |
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| charles j. gelso (b. 1941) |
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| matthew gelso American cross country skier, US (b. 1988) |
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