Last name Ronaldu (رونالدو 
, Роналдо 
, Ronaldu 
) , around the globe, is a rare surname. The last name Ronaldu is habitual in Bulgaria, where it is a rare surname, Sudan, and Saudi Arabia. Measured by absolute frequency, it is the most numerous in Sudan, Egypt, and Saudi Arabia. Likewise, Ronaldu is the forename as well as the last name.