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All over the world, Cau (驹 , 求
, Cau
) is a common largely masculine, but seldom girly first name. The first name Cau is characteristic of China, where it is a rare largely boy's, but uncommonly female name, Vietnam, where it is a rare principally boy's, but very infrequently feminine name, and Romania, where it is a rare male name. Not in comparison with a country's population, it is commonest in China, India, and Vietnam. More frequently, Cau is the last name as well as the forename.
Cau is also a name for the fictitious and mythical characters: .