In a dispute over the château de Gien with Peter of Courtenay, Hervé came to a settlement in 1199, having defeated and captured his overlord Peter at Cosne-sur-Loire.[3] After Peter's death in 1219, he became Count of Auxerre and Tonnerre also;[4] with Philip II, Marquis of Namur and Robert de Courtenay contesting Auxerre. He acquired Liernais also, in 1210.
^There are several places in France called Beaulieu, and it is uncertain which this one was. The County of Nevers roughly corresponds to the modern department of Nièvre, and this Beaulieu may have been Beaulieu, Nièvre. Alternatively, Beaulieu may have been the name of the priory itself; for example, French Wikipedia lists several Abbayes de Beaulieu, most of which are not associated with a settlement of that name.