This is all I can find. I am not a jurisprudence major.

Azo refers to Azo Porous (1150-1230), a representative figure of the Commentary School.

Western academic circles generally believe that although the historical origin of modern Western jurisprudence is Roman jurisprudence, its direct origin is the school of commentaries led by Inarius, a teacher at the University of Bologna in medieval Italy. Thanks to the efforts of the Commentary School, a bridge was built between Roman jurisprudence and modern jurisprudence.

The School of Glossators was born at the end of the 11th century. Its founder was Irnerius (about 1055-1130), a teacher at the University of Bologna in Italy. . The representative figures are Azo Porous (about 1150-1230) and Accursius (about 1182-1260).

It was Azor and Axius who made great contributions to the school of exegesis and gave it its final shape. Azzo was a student of Barcenus (a disciple of Inarius) and became a professor of civil law at the University of Bologna after graduation. On the one hand, he inherited the mainstream position of his teacher, but on the other hand, he also paid attention to absorbing the achievements of the non-mainstream school represented by Gauser, one of the four doctors. Therefore, the annotation school reached the peak of its development in his hands. . His annotated compilations and guides on the Justinian Code and Justinian's Ladder of Jurisprudence have gained a wide reputation not only in Italy but throughout Europe and have become an indispensable resource for those trying cases in court. Therefore, there was a popular saying at that time: "If you don't read Azo's books, you will not be able to enter the palace (court)" (Chi non ha Azo non vada a palazzo). In fact, in Azzo's time, the science of legal annotation had already developed for more than a hundred years. Therefore, there were already a large number of works annotating the Roman "Summa". Among them, a considerable number of works had left the subject of Roman law. Commentaries on the original works, but only on the commentaries of their teachers, thereby making Roman law more complex and confusing. In order to make up for this defect, Azuo decided to make a second annotation of the "Encyclopedia of National Law". To this end, he created a collection of annotations on the "Justinian Code" and "Justinian's Ladder of Jurisprudence". Although, Western scholars have been debating whether Azzo's works are plagiarisms from the works of his teacher Barcenus and others. However, it is a fact that his works were widely welcomed by European countries as soon as they were published. Even on the other side of the ocean, in England, the famous jurist H. D. Bracton (about 1216-1268) in the 13th century quoted in his famous work "On the Laws and Customs of England" (Delegibus etconsuetudinibus Angliae libri quinque, 1250) Most of the Roman law materials are also the works of Azzo.