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Family name Sadh (Sadh , ساده , साधु) , throughout the world, is a common cognomen. The family name Sadh is habitual in Iran, where it is quite a rare surname, United Arab Emirates, where it is a rare surname, and Iraq. Measured by absolute frequency, it is commonest in India, Iran, and Iraq. Much less frequently, Sadh is the forename as well as the last name.