that the Messenger of Allah (ﷺ): "When you name yourself after me, then do not use my Kunyah."
Jami` at-Tirmidhi Book 43, Hadith 116
← Previous Hadith that the Prophet (ﷺ) prohibited that one use his name and his Kunyah; naming themselves Muhammad Abul-Qasim.

Jami` at-Tirmidhi Book 43, Hadith 115 Next Hadith → 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."

Jami` at-Tirmidhi Book 43, Hadith 117