Cognomen साधना (Sadhana 
, साधना ) , throughout the world, is quite a rare surname. The last name साधना is characteristic of Sri Lanka, where it is quite a rare surname, Oman, where it is a rare surname, and India. Not in comparison with a country's population, this name is the most popular in India, Indonesia, and Sri Lanka. Much more prevalently, साधना is the forename as well as the last name.