[1] His younger brother Christian Heinrich Heineken (1721-1725) was a child prodigy known as "the infant scholar of Lübeck".
[1] He became a private tutor about 1730, first in the household of Johann Ulrich König, a Dresden court poet, and afterwards with Count Alexander von Sulkowsky.
[1] In 1739, he became the private secretary and librarian for Count Heinrich von Brühl, an important statesman and art collector.
[1] In 1746, King Augustus III of Poland appointed him director of the royal collection of prints and drawings.
[1] Heineken was interested especially in woodcuts and engravings from the period before Albrecht Dürer and bought many examples for the collection.