Family name Koschak (Koschak 
) , around the world, is a rare surname. The family name Koschak is habitual in Austria, where it is quite a rare surname, Germany, where it is a very rare surname, and New Zealand. Not in comparison with a country's population, this name is the most popular in the United States, Austria, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Koschak | Australia, Austria, Germany, Brazil, United States |
| aldobrand koschak AT (b. 1759) |
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| günther koschak Austrian footballer, AT (b. 1962) |
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| philipp koschak AT (b. 1961) |
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| michaela koschak German television presenter and meteorologist, DE (b. 1977) |
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Mr, Lori, Lynn, Jane, Josh, John, Joan, Jody, Jeff, Jyni, Tara, Toby, Troy, Zach, Maria, Megan, Shari, Susan, Steve, Stacy, Scott, Alice, Lisa, Leah, Greg, Dawn, Ms, Amy, Kim, Ray, Joe, Ivo, Mary, Matt, Mike, Seth, Abbie, Andy, Anne, Cody, Beth, Brad, Bill, Karl, Kate, Rick, Ryan, Dave, Anna, and Agnes