Surname 约 (Yeo 
, Yoe 
, 约 
) , worldwide, is a widespread cognomen. The family name 约 is habitual in Singapore, where it is a widespread surname, Ivory Coast, where it is a common surname, and Brunei, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Singapore, Ivory Coast, and Myanmar. Very seldom, 约 is the forename as well as the last name.