It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that a child was born to an Ansari. He wanted to name him Muhammad and came to the Prophet (peace and blessings be upon him) to ask. The Prophet (peace and blessings be upon him) said: The Ansar have done well by naming after my name, so name after my name, but do not take my kunyah (patronymic) as your kunyah.