It is related that Umar, may Allah be pleased with him, heard one man say to another, “O Dhul-Qarnayn!” He said, “You have taken the names of the prophets, and were not satisfied until you took the names of the angels as well.” (1)
The majority held that he was a just and righteous king. (2)
They differed over why he was called Dhul-Qarnayn. Al-Zuhri said: “Because he reached the two extremities of the sun: its rising-place and its setting-place.”
It was also said: because he ruled over Rome and Persia.
And it was said: because he entered the realms of light and darkness.
And it was said: because he saw in a dream that he had taken hold of the two horns of the sun.
And it was said: because he had two fine locks of hair.
And it was said: because he had two horns concealed by his turban.
Abu al-Tufayl narrated from Ali that he said: [He was called “Dhul-Qarnayn” because] (3) he commanded his people to fear Allah, so they struck him on his right horn and he died. Then Allah brought him back to life. He again commanded them to fear Allah, so they struck him on his left horn and he died, and Allah restored him to life. (4)
They also differed concerning his name. It was said that his name was Marzuban ibn Mirzabbah the Greek, from the descendants of Yunan ibn Japheth ibn Noah. And it was said that his name was Alexander ibn Filafus ibn Yamalus (5) the Roman. (6)