Surname おかだ (Okada 
, おかだ) , worldwide, is a common last name. The cognomen おかだ is characteristic of Guam, where it is quite a common surname, Cayman Islands, and Paraguay, where it is quite a rare surname. In absolute terms, the name is most common in Brazil, Japan, and the United States. Very seldom, おかだ is the forename as well as the last name.