What is the ruling on naming a newborn "Sa'dullah"?

There is no objection to naming a newborn "Saadullah" (Joy of God), as it is similar to names like "Ata'ullah" (Gift of God), "Hibbatullah" (Boon of God), and "Awnullah" (Help of God). All these names are formed by attributing the object to its doer, meaning "joy from God." A number of scholars and literary figures have been named with this name.