François-Auguste de Pontac (1636-1694) was the last Pontac
to own Haut-Brion through direct inheritance.
He served as President of the parliament in Bordeaux in 1653, however his activities in London (for the prestige of Haut-Brion) became more important
than his time
in Bordeaux. In 1666, he opened a tavern
in London called the "Enseigne de Pontac", which
became "...the most fashionable place in London..." in its time.
Because he was so often absent, François-Auguste left his manager Bertrand Dubut in charge. Dubut took care of the domain with few technical resources. He introduced the techniques of racking and fining.
François-Auguste lived a life so rich and careless that the château was repossessed twice in order to pay his debts. He was eventually able to save his property thanks to both his influence and that of his wife, Félicie de Crussol d'Uzès. At his death, his debts passed to his sister Thérèse, as he left no children.
Thérèse de Pontac. Thérèse inherited two-thirds of Haut-Brion. The last third became the property of Louis-Arnaud Lecomte, baron of Tresne, nephew of François-Auguste. In 1654, Thérèse married Jean-Denis d'Aulède de Lestonnac. Curiously, Jean-Denis died only eighteen days after inheriting Haut-Brion from his wife.
His son, François-Delphin d'Aulède de Lestonnac,
(baron and then marquis) became Lord, first of Margaux, and then of Haut-Brion.
After the death of François-Delphin in 1746, his sister Catherine d'Aulede
de Lestonnac, widow of François-Joseph de Fumel since 1688, inherited
the property.