Those holding this view differed over whether a newborn may be named Qāsim. Some permitted it, while others prohibited it. Those who permitted it reasoned that the prohibition concerned sharing the kunya exclusive to the Prophet, peace and blessings be upon him, whereas this did not apply to the name. Those who prohibited it reasoned that the grounds for prohibiting the kunya applied equally to the name, or that the name was even more deserving of prohibition. They said: His words, “I am only a distributor,” indicate this exclusivity.
The second view is that the prohibition concerns combining his name and his kunya; using either without the other is unobjectionable. Abū Dāwūd entitled a chapter “Those who held that the two should not be combined,” then cited (1) the hadith transmitted by Abū al-Zubayr from Jābir, in which the Prophet, peace and blessings be upon him, said:
“Whoever takes my name must not adopt my kunya, and whoever adopts (2) my kunya must not take (3) my name.”
Al-Tirmidhī also related it and said: “It is a good, singular hadith.”
Al-Tirmidhī (4) also related it through Muhammad ibn ‘Ajlān, from his father, from Abū Hurayrah, and said: “Good and authentic.” Its wording is:
“The Messenger of Allah, peace and blessings be upon him, forbade anyone to combine his name and his kunya, calling someone Muhammad Abū al-Qāsim.”
The proponents of this view said: This qualifies and explains the prohibition against adopting his kunya reported in the two Sahīh collections. They further said: Combining the two means sharing the distinctive combination of his name and kunya; when either is used without the other, that distinctive association no longer applies.