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Cognomen सुमन (Suman , सुमन ) , all around the world, is a widespread last name. The surname सुमन is characteristic of Nepal, where it is quite a common surname, Qatar, and Oman (explore the name in all countries). Measured by absolute frequency, it is commonest in Southern Asia, particularly India, Bangladesh, and Nepal. Much more frequently, सुमन is the forename as well as the last name.