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Family name W. (W.
, В.
, 威廉
) , globally, is a common cognomen. The family name W. is habitual in Taiwan, where it is quite a common surname, Serbia, where it is quite a rare surname, and Indonesia. Not in comparison with a country's population, it is the most numerous in Indonesia, Taiwan, and Pakistan. Likewise, W. is the forename as well as the last name.