Family name Kostello (Kostello 
) , all around the world, is a very rare surname. The family name Kostello is habitual in Canada, where it is a very rare surname, the United States, and South Africa. Much less frequently, Kostello is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kostello | Germany, Canada, United States, South Africa, India |
Mr, James, Erika, Heath, Frank, Steven, Cheryl, Kailee, Kerrie, Robert, Debbie, Donald, George, Lauren, Janice, Joseph, Joan E, Teresa, Trista, Travis, Haruko, Michael, Janet, Louis, David, Kevin, Don, Lee, Lou, Adam, Dave, Dale, Dawn, Geri, Gene, Greg, Shelley, Lana, John, Jeff, Tony, Eric, Steve, Amber, Craig, Bruno, Karen, Kathy, Lisa, and Anthony