2) Ar-Rahman  الرحمن : The Beneficent.

One who recites this name 100 times everyday will get sharp memory.

Ar-Rahman as Mentioned in Quran :

The Most Gracious has imparted this Qur'an unto man. He has created man: He has imparted unto him articulate thought and speech. At His behest the sun and the moon run their appointed courses; before Him prostrate themselves the stars and the trees.And the skies has He raised high, and has devised for all things a measure, so that you too, O men, might never transgress the measure of what is right: weight, therefore, your deeds with equity, and cut not the measure short! and the earth has He spread out for all living beings, with fruit thereon, and palm trees with sheathed clusters of dates, and grain growing tall on its stalks, and sweet-smelling plants.Which, then, of your Sustainer's powerscan you disavow?

- Ar-Rahman 55:1-13, tr. Asad