/usr/share/man/man3/efi_guid_to_name.3.gz is in libefivar-dev 0.23-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/efi_get_variable.3.gz
/usr/share/man/man3/efi_get_variable.3.gz