The origin of the name of the Chateau Nenin Winery is uncertain.

Two centuries ago. At this juncture the property was in the hands of the Paillet family although this was not the case for long; a daughter took the property with her as a gift when she married into the Despujols family, and for many decades it is this latter name that has been most associated with Nenin.

The property had been left by Emmanuel Despujols to his son François in 1975, and it was under his tenure that the problems came to light; the status was marked and the wine was no longer held in such high regard. Without doubt the Napoleonic laws of inheritance were at least partly to responsibility for this as by the time the century was drawing to a close there were 17 family members each holding a stake in Nenin. The only solution, on which they could agree, as so often seems to be the case, was to sell the property.

In 1997 the chateau and vineyards were acquired by the Delon family, a dynasty best associated with Léoville-Las-Cases, the St Julien super-second. The left-bank proprietors gained possession of a right-bank property, and the Delons joined the ranks of proprietors who own properties on both sides of the Gironde; this is, at the highest level at least, a very exclusive club.

Today Nenin rests in the hands of Jean-Hubert Delon and his sister Genevieve d'Alton.