  Holbach was born in 1723 in Edesheim. He was raised in Paris, principally by his uncle, Franciscus Adam d’Holbach, and attended the University of Leiden from 1744 to 1748 or 1749. Holbach particularly enjoyed the parties there. It is likely that, at least at first, the dinners Holbach gave in Paris were modelled on the parties he attended at Leiden. In 1749, Holbach married his second cousin, Basile-Geneviève d’Aine. About 1753 or 1754 both his uncle, Franciscus, and his father in law died, leaving Holbach a considerable fortune. 