Ajam
According to the book "Documents on the Persian Gulf's name ", pages 22–44 explanation of Ajam and the Persians "The word Ajam has many different uses and meanings throughout the history. words had a simple meaning at first, but over the time, other meanings and concepts are added to its early meaning, especially when the word goes to other languages. Ajam was first used for Persian native speaking in the poems of the Arab poet of pre Islam  but after expansion of Islam it also was referred to Turks,Zoroastrianism and others. Today, in Arabic literature, "Ajam" is used to refer to the non-Arab person. Ajam has never meant dumb in Arabic literature , using The word Ajam as a derogatory meaning was very late and very rare and unofficial concept in Umayyad period time.