Family name Trefny (Trefny 
, טריפה 
) , all over the world, is a rare cognomen. The cognomen Trefny is characteristic of Czechia, where it is quite a rare surname, Slovakia, where it is a rare surname, and Switzerland. Measured by absolute frequency, it most frequently occurs in Czechia, the United States, and Slovakia. Very seldom, Trefny is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Trefny | Czechia, Austria, Switzerland, United States, Slovakia |
| טריפה | Israel |
| rudolf trefny holocaust victim, b. 1912-04-03, CZ (b. 1912) |
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| frank trefny American artist, US (b. 1948) |
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| marcel philipp trefny researcher |
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| christina trefny AT (b. 1976) |
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| radovan trefny Slovak ice hockey player, SK (b. 1987) |
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Mr, Steve, Scott, Amber, Chuck, Chris, Carol, Craig, Becky, Becca, Borek, Karel, Karla, Kelly, Kiara, Peter, Debby, Donna, Leigh, Linda, Ludek, James, Susan, Jared, Marek, Hans, Ms, Amy, Ben, Ken, Pam, Jan, Jen, Mark, Mike, Myra, Alex, Anne, Paul, Rick, Lars, Lisa, Luke, Jann, John, Jean, Jiri, Ivan, and Jobea