Family name Giesy (Giesy 
) , throughout the world, is a rare last name. The family name Giesy is habitual in Honduras, where it is a rare surname, the United States, where it is a very rare surname, and Mexico. Very seldom, Giesy is the forename as well as the last name.
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| Giesy | Canada, Brazil, United States, Mexico, Honduras |
| john ulrich giesy American physician, novelist and author, US (b. 1877) |
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| robert marshall giesy botanist (b. 1922) |
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giesy medeiros Brazilian politician, BR |
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| john p giesy American ecotoxicologist (b. 1948) |
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| daniel giesy Ph.D. University of Wisconsin-Madison 1964 |
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Sam, Lynn, Jane, Jack, Jade, Josh, John, Joan, Theo, Eric, Erin, Faye, Maria, Marya, Sarah, Susan, Scott, Alice, Alana, Alvin, Alysa, Chris, Lori, Craig, Leah, Ryan, Amy, Bob, Ron, Les, Jay, Tom, Mary, Mark, Mike, Alex, Alan, Anne, Adam, Carl, Beth, Beck, Bill, Kate, Kurt, Ross, Russ, Greg, and Bobby