(O Prophet!) They ask you about Zul-Qarnain, (generally interpreted as Alexander, the great or Sikandhar-e-Aaz’m). Say, "I will recite to you some of his story."
They will ask you about Zulgharnain (Double honored man; most probably Cyrus, king of Persia who freed the Jews from the Babylonian tyranny. It may as well be a Prophet sent to a lost American civilization!) Say: “Here is a short story of him.&rdquo
Faridul Haque
And they ask you regarding Zul-Qarnain; say, "I shall recite his story to you."
Hasan Al-Fatih Qaribullah
They will ask you about ThulKarnain (the pious and chosen). Say: 'I will recite to you something of his story
They ask you about Dhul-Qarnayn... Say, “I will recite to you a dhikr (remembrance) about him.”
Sayyed Abbas Sadr-Ameli
And they ask you about Zulqarnayn. Say: 'I will recite unto you a remembrance of him'.
Al-muntakhab fi tafsir al-Qur'an al-Karim
They ask you O Muhammad about the Bi-horned, Zul-Qarnain! Say to them: "I will give you an account of his actions and the occurrences constituting his history in which he equally excelled"