Question: Which prominent mathematician in the Bernoulli family did Jakob II Bernoulli study under?
Sentence (from "Jakob II Bernoulli"): The early lessons which he had received from his father were continued by his uncle Daniel, and such was his progress that at the age of twenty-one he was called to undertake the duties of the chair of experimental physics, which his uncle’s advanced years rendered him unable to discharge.
Relevant evidence: Yes