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Family name 온 (On , 蕴 , 温 , among others...) , around the globe, is a prevalent last name. The surname 온 is characteristic of Brunei, where it is a common surname, China, where it is quite a common surname, and Malaysia (explore the name in all countries). In absolute terms, it is the most numerous in China, Malaysia, and Myanmar. Very seldom, 온 is the forename as well as the last name.