Is it permissible to name one's son "Malik," knowing that it is one of the beautiful names of Allah, such as "Malik Yawm ad-Din (Master of the Day of Judgment)"?

It is permissible to be named "Malik," for Allah Almighty is not simply "Malik" (Owner/King) as a standalone name, but rather "Malik ul-Mulk" (Owner of all Sovereignty) and "Maliki Yawm al-Din" (Master of the Day of Judgment). It is permissible for a servant to be named with names shared between Allah and His servants, such as "Kareem" (Generous) and " "Azeez" (Mighty), while understanding that the reality of the attribute for Allah differs from its reality for a creature. However, it is forbidden to be named with names exclusive to Allah Almighty, such as Al-Khaliq (The Creator), Ar-Razzaq (The Provider), and Malik ul-Mulk (Owner of all Sovereignty), because these are not befitting for servants.