Erard I, Count of Brienne
Erard I, Count of Brienne (1060–1114) was
Tonnerre
.
In 1097 he fought in the First Crusade.
In 1110 he married Alix of Roucy-Ramerupt, daughter of André de Montdidier-Roucy, seigneur de Ramerupt and son of Hilduin IV, Count of Montdidier. They had 3 children:
- Gautier II of Brienne, count of Brienne and lord of Ramerupt. Father of Erard II.
- Guy of Brienne
- Félicité of Brienne, who married Simon I of Broyes, then in 1142 Geoffroy III, sire de Joinville.