The answer is here already here.
Create a file with texteditor, save it ~/.local/share/application and name it [Filename].desktop. (Replace [Filename] with what ever you want.)
[Desktop Entry]
Name=[Desktop Folder Name]
Ecec=nautilus /[Full Path]
Type=Application
Icon=folder
You can replace [Desktop Folder Name] with everything you want. That will be displayed below the desktop icon.
Replace [Full Path] with the path. For Downloads-folder for example Exec=nautilus /home/purism/Downloads. Not allowed is the short way Exec=nautilus ~/Downloads.