Abraham ben Moses ben Maimon was the son of Maimonides who succeeded his father as Nagid of the Egyptian Jewish community.
Background
Avraham was born in Fostat, Egypt - his father, Maimonides, was fifty-one years old then When his father died in 1204 at the age of sixty-nine, and Avraham was only nineteen, Avraham was recognised as the greatest scholar in his community.
Career
The boy was "modest, highly refined and unusually good natured". He was also noted for his brilliant intellect and even while a youth became known as a great scholar. Thus, he succeeded Rambam as Nagid (head of the Egyptian Jews), as well as in the office of court physician, at the age of only eighteen.
(The office of nagid was held by the Maimonides family for four successive generations until the end of the 14th century).
Views
Rabbi Avraham greatly honored the memory of his father, and defended his writings and works against all critics.