Around the world, Zainullah (Zainullah 
) is quite a rare male forename. The given name Zainullah is characteristic of Afghanistan, where it is quite a rare male name, United Arab Emirates, and Saudi Arabia, where it is a rare male name. Measured by absolute frequency, it is the most numerous in Afghanistan, Saudi Arabia, and Indonesia. Very seldom, Zainullah is the last name as well as the forename.