Volume 3, Book 34, Number 331:
Narrated Anas bin Malik:
While the Prophet was in the market, somebody, called, “O Abu-l-Qasim.” The Prophet turned to
him. The man said, “I have called to this (i.e. another man).” The Prophet said, “Name yourselves by
my name but not by my Kuniya (name).” (In Arabic world it is the custom to call the man as the fath –
er of his eldest son, e.g. Abu-l-Qasim.)
(See Hadith No. 737, Vol. 4)