All the
Names and Attributes of Allah are praiseworthy. Allah describes them all as husna (the most beautiful). Allah says: &"To Allah belong the Most Beautiful Names, so invoke Him by them; and leave (the company of) those who practice deviation concerning His Names. They will be recompensed for what they have been doing&" (Al-A&"râf: 180).They are not the Most Beautiful Names just because of the words themselves, but because they indicate His most Perfect Attributes. All
Allah&"s Names are praiseworthy, laudable, meritable and deserve to be glorified, and that is the reason why they are the Most Beautiful Names. His Attributes are the Most Perfect, all His Descriptions are the Most Glorified, and all His Actions are carried out in complete wisdom, mercy, and justice.
source:
Islamkingdom