Family name ياو (Yau 
, Yao 
, Yaw ) , all around the world, is a prevalent cognomen. The last name ياو is characteristic of Hong Kong, where it is a common surname, Ivory Coast, and Cayman Islands (explore the name in all countries). Measured by absolute frequency, it is the most numerous in China, Nigeria, and Ivory Coast. Very seldom, ياو is the forename as well as the last name.