The County of Porcien dates back to the eighth century and her rulers were loyal to the Carolingian dynasty.
Étienne invaded the County of Ivois and displaced Rudolfe II, installing himself as count.
A charter dated 21 Nov 955 records an agreement between Eremboldus miles [a military commander] and Robert, the Archbishop of Trier, relating to property including Aduna in comitatu Ivotio inter Boura et Lannilley.
Étienne and his wife Frédévide founded the priory of Thin le Moutier at Porcien.
Etienne built the castle of Mirwart in Ivois, and donated property to the Abbey of Chauvency (near Montmédy) after he became paralysed (cause unknown).