Family name Janss (Janss 
) , all around the world, is a rare surname. The family name Janss is habitual in Western Europe, particularly Belgium, where it is a rare surname, Netherlands, and Germany, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in the United States, Germany, and Netherlands. Much less frequently, Janss is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Janss | Germany, Belgium, Spain, United States, Netherlands |
| jan janss Flemish tapestry weaver (b. 1644) |
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| dagny janss artist (b. 1945) |
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| edmee janss cricketer, NL (b. 1965) |
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| emily janss Association footballer, US (b. 1978) |
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| guyonne janss (b. 1968) |
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| luc janss researcher ORCID ID = 0000-0001-9804-1529 |
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| harold janss American real estate developer |
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| edwin janss American real estate developer |
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Mr, Jane, Jack, John, Jill, Tong, Todd, Nick, Elle, Eric, Erik, Erin, Sally, Sarah, Shari, Silke, Susan, Steve, Scott, Alena, Allan, Chase, Lisa, Cheri, Gael, Dave, Ms, Ann, Amy, Bob, Ray, Liz, Jan, Tim, Mary, Sara, Alex, Alan, Anna, Abby, Bavo, Brad, Bill, Paul, Rich, Rick, Ryan, Door, and Becky