Theodoric I of Montbéliard

Theodoric I (Thierry, c. 1045–1103) ruled as count of Montbéliard, Bar and Verdun and lord of Mousson. The son of Count Louis of Scarpone and Sophie of Bar, he claimed the Duchy of Lorraine after his father's death.

Emperor Henry IV rejected him; when he ravaged the Diocese of Metz in reprisal, he was defeated by Bishop Adalbéron III and Duke Theodoric II. Reconciled with the Church, he founded a Benedictine abbey at Walbourg in 1074.

He did not take the cross, sending his son Louis on crusade instead. After 1096 Bishop Richer granted him Verdun for life.