Name taken from Verse 1 where there is a mention of “Al Qamar”.
1 The hour has drawn near, and the moon has been cleft 1
The Hour has come near, and the moon has split But it does not mean that this name is the actual topic discussed in the whole Surah. It is just a reference and mark/symbol to distinguish this Surah from others as it is with most other Surahs of the Quran. While there are diversified topics discussed in these Surahs.
1 The hour has drawn near, and the moon has been cleft 1
The Hour has come near, and the moon has split But it does not mean that this name is the actual topic discussed in the whole Surah. It is just a reference and mark/symbol to distinguish this Surah from others as it is with most other Surahs of the Quran. While there are diversified topics discussed in these Surahs.