Question: Which prominent mathematician in the Bernoulli family did Jakob II Bernoulli study under?
Context: Daniel Bernoulli FRS ( ; ] ; 8 February 1700 – 17 March 1782) was a Swiss mathematician and physicist and was one of the many prominent mathematicians in the Bernoulli family.  He is particularly remembered for his applications of mathematics to mechanics, especially fluid mechanics, and for his pioneering work in probability and statistics.  His name is commemorated in the Bernoulli's principle, a particular example of the conservation of energy, which describes the mathematics of the mechanism underlying the operation of two important technologies of the 20th century: the carburetor and the airplane wing. Jacob Bernoulli (also known as James or Jacques; 6 January 1655 [O.S. 27 December 1654] – 16 August 1705) was one of the many prominent mathematicians in the Bernoulli family.  He was an early proponent of Leibnizian calculus and had sided with Leibniz during the Leibniz–Newton calculus controversy.  He is known for his numerous contributions to calculus, and along with his brother Johann, was one of the founders of the calculus of variations.  He also discovered the fundamental mathematical constant e.  However, his most important contribution was in the field of probability, where he derived the first version of the law of large numbers in his work "Ars Conjectandi". Johann III Bernoulli (also known as Jean; 4 November 1744, Basel – 13 July 1807, Berlin), grandson of Johann Bernoulli, and son of Johann II Bernoulli.  He was known around the world as a child prodigy.  He studied at Basel and at Neuchâtel, and when thirteen years of age took the degree of doctor in philosophy.  When he was fourteen, he got the degree of master of jurisprudence.  At nineteen he was appointed astronomer royal of Berlin.  A year later, he reorganized the astronomical observatory at the Berlin Academy.  Some years after, he visited Germany, France and England, and subsequently Italy, Russia and Poland.  His travel accounts were of great cultural and historical importance (1772–1776; 1777–1779; 1781).  He wrote about Kashubians. Peter Werenfels (May 20, 1627 – May 23, 1703) was a Swiss theologian, professor at the University of Basel and antistes of the Basel church.  He served as the doctoral advisor of prominent mathematician Jacob Bernoulli. Nicolaus II Bernoulli, a.k.a. Niklaus Bernoulli, Nikolaus Bernoulli, (6 February 1695, Basel, Switzerland – 31 July 1726, St. Petersburg, Russia) was a Swiss mathematician as were his father Johann Bernoulli and one of his brothers, Daniel Bernoulli.  He was one of the many prominent mathematicians in the Bernoulli family. Jakob II Bernoulli (17 October 1759 in Basel – 3 July 1789 in Saint Petersburg), younger brother of Johann III Bernoulli.  Having finished his literary studies, he was, according to custom, sent to Neuchâtel to learn French.  On his return, he graduated in law.  This study, however, did not check his hereditary taste for geometry.  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.  He afterwards accepted the situation of secretary to count de Brenner, which afforded him an opportunity of seeing Germany and Italy.  In Italy, he formed a friendship with Lorgna, professor of mathematics at Verona, and one of the founders of the Società Italiana for the encouragement of the sciences.  He was also made corresponding member of the royal society of Turin; and, while residing at Venice, he was, through the friendly representation of Nicolaus von Fuss, admitted into the academy of St Petersburg.  In 1788, he was named one of its mathematical professors. Johann II Bernoulli (18 May 1710, Basel – 17 July 1790, Basel; also known as Jean) was the youngest of the three sons of Johann Bernoulli.  He studied law and mathematics, and, after travelling in France, was for five years professor of eloquence in the university of his native city.  In 1736 he was awarded the prize of the French Academy for his suggestive studies of aether.  On the death of his father he succeeded him as professor of mathematics in the University of Basel.  He was thrice a successful competitor for the prizes of the Academy of Sciences of Paris.  His prize subjects were the capstan, the propagation of light, and the magnet.  He enjoyed the friendship of P. L. M. de Maupertuis, who died under his roof while on his way to Berlin.  He himself died in 1790.  His two sons, Johann and Jakob, are the last noted mathematicians of the Bernoulli family. Johann Bernoulli (also known as Jean or John; 6 August [O.S. 27 July] 1667 – 1 January 1748) was a Swiss mathematician and was one of the many prominent mathematicians in the Bernoulli family.  He is known for his contributions to infinitesimal calculus and educating Leonhard Euler in the pupil's youth. Jakob Fugger of the Lily (German: "Jakob Fugger von der Lilie" ) (6 March 1459 – 30 December 1525), also known as Jakob Fugger the Rich or sometimes Jakob II, was a major German merchant, mining entrepreneur and banker.  He was a descendant of the Fugger merchant family located in the Free Imperial City of Augsburg, where he was also born and later also elevated through marriage to Grand Burgher of Augsburg (German "Großbürger zu Augsburg").  Within a few decades he expanded the family firm to a business operating in all of Europe.  He began his education at the age of 14 in Venice, which also remained his main residence until 1487.  At the same time he was a cleric and held several prebendaries, even though he never lived in a monastery.  Fugger is held to be one of the wealthiest individuals in modern history, alongside the early 20th century industralists John D. Rockefeller and Andrew Carnegie. Nicolaus Bernoulli (born 21 October 1687 in Basel, died 29 November 1759 in Basel; also spelled Nicolas or Nikolas), was a Swiss mathematician and was one of the many prominent mathematicians in the Bernoulli family.
Answer: Daniel Bernoulli