Sahih Muslim Book 025, Hadith Number 5321.

Chapter : Forbiddance in calling one (other than Allah's Apostle) with the Kunya of Abdu'l-Qasim and the fact pertaining to good names.

Jabir b. 'Abdullah reported that a child was born to a person from the Ansar and he made up his mind to give him the name of Muhammad. He came to Allah's Apostle (may peace be upon him) and, asked him (about it), whereupon he said: The Ansar have done well to give the name (to your children) after my name, but do not give them the kunya after my kunya.