Family name Katnich (Katnich 
) , across the world, is a very rare cognomen. The family name Katnich is habitual in Australia, where it is a rare surname, Canada, where it is a very rare surname, and the United States. Very seldom, Katnich is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Katnich | Italy, Canada, United States, Australia |
Sue, Helen, Marisa, Mathew, Robert, Donald, Laurie, Joseph, John V, Trini, Tracey, Melissa, Michael, Suzanne, Barbara, Pauline, Vanessa, Michelle, Gracelyn, Marijan, Donna, Diana, Debra, Kai, Rob, Lee, Joe, Mara, Sara, Alan, Greg, Glen, John, Joey, Tina, Fred, Maria, Mirta, Sonja, Agnes, Karen, Robin, Virginia, and Vanessa Kay