Narrated 'Ali bin Abi Talib:
that he said: "O Messenger of Allah (ﷺ)! If I have a son after you do you think I could name him your Kunyah?" He said: "Yes." So he said: "So that was permitted for me." (PT)
English reference (PT): Vol. 5, Book 41, Hadith 2843 (PT)
Arabic reference (PT): Book 43, Hadith 3079 (PT)