William I of Dampierre

Guillaume I of Dampierre (c. 1130 - c. 1174) was Lord of Dampierre, Saint-Dizier, Moëslains and Saint-Just, Constable of Champagne and Viscount of Troyes in the middle of the 12th century. He was the son of Guy I of Dampierre, lord of Dampierre, and Helvide de Baudément. Biography On the death of his older brother Anséric de Dampierre, who probably died young, he became his father's heir. During his father's lifetime, he received the seigneury of Moëslains as an appanage, probably the ancestral stronghold of his family [1], and signed in the charters with the name of Guillaume de Moëslains. This practice was relatively common at the time and allowed a son to have an income, while his parents were alive and to gain experience in the administration of a fief. In 1152, he was appointed Grand Buttler of Champagne Henry I, Count of Champagne.