Is "Al-Kafi" a name or an attribute of Allah, and is it permissible to name a son "Abd Al-Kafi"?

The name "Al-Kafi" (The Sufficient) is not mentioned in the Quran except in a qualified form or as a verb. However, it is mentioned in the Sunnah, in a hadith narrated by Abu Hurairah—even if the hadith is authentic without enumerating the names—that it is one of the Beautiful Names of Allah. For this reason, most scholars have considered it among the Beautiful Names of Allah. Therefore, there is no harm in naming a son "Abd al-Kafi" (Servant of The Sufficient).