Narrated Al-A'raj:
that Abu Hurairah conveyed to him that the Prophet (ﷺ) said: "The most despicable (Akhna) name to Allah on the Day of Judgement is that of a man named King of Kings. (Malikil-Amlak)." (PT)
English reference (PT): Vol. 5, Book 41, Hadith 2837 (PT)
Arabic reference (PT): Book 43, Hadith 3071 (PT)