Comment # 6 on bug 993401 from Marcus Schaefer

Is the efi boot menu created from contents of the grub.cfg file in some way ?
'opensuse-leap42.1-arm-jeos-devel-efi' seems like the name you setup in the
image XML description and yes this information will land in the grub.cfg menu.

You can specify any display name with

<image ... name="opensuse-leap42.1-arm-jeos-devel-efi" displayname="opensuse">
   ...
</image>

That should workaround name constraints for the efi menu

kiwi just calls grub2-install and also shim-install if our secure boot efi
image is used. If there are name constraints for the efi menu which are
different from the ones in the grub menu I think the tools should throw an
exception

Thoughts ?