Surname บิลลี่ (Billie 
, Billly 
, บิลลี่) , worldwide, is quite a rare cognomen. The last name บิลลี่ is habitual in Malaysia, where it is quite a rare surname, Zimbabwe, and South Africa, where it is a rare surname. In absolute terms, it is the most numerous in the United States, Malaysia, and Indonesia. Predominantly, บิลลี่ is the forename as well as the last name.