His name, lineage, surname, and nickname

He is: Aḥmad ibn Muḥammad ibn Ibrāhīm An-Naysābūriyy, Ash-Shāfiʿiyy, Abū Isḥāq Ath-Thaʿlabiyy, and it is said: Ath-Thaʿālibiyy. The reciter, the interpreter, the preacher, and man of letters.
Abū Isḥāq is attributed to the city in which he lived, which is Naysābūr.
This great city was the best of the cities of Khorasan, and a great stronghold of knowledge, hosting a large number of scholars and virtuous people.
As-Samʿāniyy said: It is the best city that most abounded in goodness in Khorasan. There are an uncountable number of people that are attributed to it. Al-Ḥākim Abū ʿAbdullah Muhammad bin ʿAbdullah Al-Ḥāfiẓ Al-Bayyaʿ compiled the history of its scholars in eight large volumes.
Yāqūt Al-Ḥamawiyy further said: It is a great city with tremendous virtues. It is the origin of the nobles and the source of scholars. Among all the countries I have toured, I never saw the like of it.
On the reason of having its name as Naysābūr, Abū ʿAliyy Al-Ghassāniyy reported in his book Taqyīd Al-Muhmal through his own chain of transmission that went back to Abū Hatim Sahl ibn Muḥammad As-Sijistāniyy that he said: “It was called Naysābūr because Sābūr happened to pass by it, and when he contemplated it he said: ‘This land is suitable to be a city,’ so he commanded for its bamboo reeds to be cut and compressed, then the city was constructed. That is why it was called Naysābūr, and nay means bamboo reeds.
It was conquered during the era of ʿUthmān ibn ʿAffān, may Allah be pleased with him, on the hands of his cousin ʿAbdullah ibn ʿĀmir ibn Kurayz in the yea 29 AH. Other reports said that it was conquered during the reign of ʿUmar, may Allah be pleased with him, on the hands of Al-Aḥnaf ibn Qays, but it was taken back by its people during the time of ʿUthmān, so he sent forth ʿAbdullah ibn ʿĀmir who succedded in restoring it to the Muslim state.
The surname of Abū Isḥāq is Ath-Thaʿlabiyy, yet it is not an attribution to thaʿlab (fox) as stated by Ibn Al-Athīr and Ibn Kathīr agreed with him.
He is also called Ath-Thaʿālibiyy.
His nickname is Abū Isḥāq, and it is the one mentioned by all those who provided a biography for him, except for Jalāl Ad-Dīn As-Suyūṭiyy who referred to him as Abū Al-Qāsim in his book Ṭabaqāt Al-Mufassirīn. However, this nickname was exclusively mentioned by As-Suyūṭiyy.