Sayyed Muhammad Husaini Ragheb, Sayyed Muhammad Husaini Ragheb has a BA in Law from Guilan University, Iran and has also undertaken Hawzah studies in Qom. He is a Cultural Affairs director of Ethics Group of Al-Mustafa Open... Answered 1 year ago

Qaf is one of the Muqatta'e(broken) letters and because this Surah starts with this letter, it has been named Qaf
As for Muqatta'e letters, it is said that no one exactly knows the meaning of these letters and at that time it drew the attention of the pagans so much when these verses were recited. 
There are other reasons as well
Please visit:
https://www.al-islam.org/islam-and-contemporary-man-muhammad-husayn-tabatabai/chapter-10-some-quranic-questions

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