Analysis of information sources in references of the Wikipedia article "ذو القرنين" in Arabic language version.
The identification... has been a controversial matter from the earliest times. In general the commentators have been of the opinion that he was Alexander the Great but the characteristics of Zul-Qarnain described in the Qur'an are not applicable to him. However, now the commentators are inclined to believe that Zul-Qarnain was Cyrus... We are also of the opinion that probably Zul-Qarnain was Cyrus...
The identification... has been a controversial matter from the earliest times. In general the commentators have been of the opinion that he was Alexander the Great but the characteristics of Zul-Qarnain described in the Qur'an are not applicable to him. However, now the commentators are inclined to believe that Zul-Qarnain was Cyrus... We are also of the opinion that probably Zul-Qarnain was Cyrus...