Luitgarde of Vermandois

Luitgarde of Vermandois (c. 914 – 9 February 978) was a French noblewoman from the Herbertian dynasty. She was a countess consort of Rouen and Normandy by her first marriage, and a countess consort of Blois and Chartres by her second. She was a daughter of Herbert II of Vermandois, and Adele, daughter of Robert I of France. She first married William I of Normandy before 940. As a widow, following his death in 942, she married Theobald I of Blois in 943 or 944.

She had at least three children from her second marriage:
 * Hugh, Archbishop of Bourges (d. 985)
 * Odo (d. 996), count of Blois
 * Emma (d. 1003), married William IV of Aquitaine