The name is also spelled Karaso, Karassu, Karso, Karsu and Karasso. The form Karasu is a Turkification of his name, meaning literally 'dark water'.
The name is sometimes written as Karaso, Karassu, Karso, Karsu, and Karasso. In Turkish naming conventions, the term Karasu denotes the person's original name, which translates to 'dark water'.