Last name Дау (Dau 
, Daou 
, Dow ) , all over the world, is a common cognomen. The cognomen Дау is characteristic of Lebanon, where it is a common surname, Mali, where it is quite a common surname, and Fiji (explore the name in all countries). Measured by absolute frequency, this name is the most popular in the United States, Lebanon, and Myanmar. Very seldom, Дау is the forename as well as the last name.