By his first wife he had one son and three daughters, all of whom predeceased their father.
His Morgenstunden appeared in 1785, and he died as the result of a cold contracted while carrying to his publishers in 1786 the manuscript of a vindication of his friend Lessing, who had predeceased him by five years.
He died on the 12th of December 1751, his wife having predeceased him in 1750.
He was thrice married and had six children, all of whom predeceased him save a daughter Rebekah, born of the first marriage, and Baruch, the son of his second wife.
Another daughter was the wife of Charles III., king of Spain, but she predeceased her father.