According to “The Unchallengeable Miracles of the Quran” by Yusuf al-Hajj:
The Qur’ an mentions the ancient rulers of Egypt with the title Fir’awn (Pharaoh). This title comes up at seventy-four places in the Qur’ an. However, in Soorah Yusuf, the Qur’ an did not mention the title “Pharaoh”. Instead, it mentioned “the King” as in the following saying of Allah:
“And the king (of Egypt) said: ‘Verily, I saw (in a dream) seven fat cows, whom seven lean ones were devouring’.” (Soorah Yusuf 12:43)
At the end of the 19th century, the Frenchman, Champ Leon, was able to read and interpret the Hieroglyphic writings and came to discover that Prophet Yusuf (Joseph), peace be upon him, lived in Egypt during the era of shepherd king (Hexus) from 1730 B.C. to 1580 B.C.1
Al Hajj- Yusuf. The Unchallengeable Miracles of the Quran.