In awt_TopLevel.c, we find the following:
        wdata->winData.shell = XtAppCreateShell("AWTapp",
                                     "XApplication",
                                     vendorShellWidgetClass,
                                     awt_display,
                                     args,
                                     argc);
and
        wdata->winData.shell = XtCreatePopupShell("AWTdialog",
                                      transientShellWidgetClass,
                                      pdata->winData.shell,
                                      args,
                                      argc);

This code hardcodes the shell name to either "AWTapp" or "AWTdialog". It
would be preferable to customize the name based on the name of the
Window/Frame/Dialog subclass, or the name of the class which contained
the main() method invoked at the command line.

This is similar to BugId 4284277 for Win32.