Surname 洛汗 (Rohan 
, 洛汗) , throughout the world, is a common cognomen. The surname 洛汗 is habitual in British Virgin Islands, where it is quite a common surname, Mauritius, and Sri Lanka (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Bangladesh, Sri Lanka, and the United States. More frequently, 洛汗 is the forename as well as the last name.