Doretta is a diminutive form of the name Dora, which itself is often considered a short form of names like Dorothy or Theodora. The name Dora originates from the Greek word 'doron', meaning 'gift'. Doretta, therefore, carries a similar connotation of being a 'gift' or 'gifted'. It is a name that has been used in various cultures, often symbolizing something precious or valuable.