All over the world, Oosthuyzen (Oosthuyzen 
) is an extremely rare unknown gender forename. Predominantly, Oosthuyzen is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Oosthuyzen | Canada, New Zealand, United States, Germany, South Africa |
Ms, Andre, Adolf, Chane, Charl, Chris, Carna, Corne, Barry, Billy, Kobus, Kevin, Petro, Peter, Riaan, Danie, Gawie, Giona, Laura, Larry, Leroy, Linda, Alida, Shaun, Shani, Shane, Sam, Roy, Dia, Jan, Mike, Anna, Peet, Ryan, Deon, Dale, Louna, Dion, Leon, Jaco, Jock, Jean, Theo, Nico, Hein, Flip, Izak, Morne, Dirk, and Jared