Leuthard I of Paris
Leuthard I of Paris (d. 813/816) was count of Paris and Fezensac.
Leuthard married Grimhilda with whom he had the following children:
- Engeltrude of Fézensac, wife of Odo of Orléans, and mother of Ermentrude of Orléans who married future emperor Charles the Bald.
- Adalard the Seneschal (seneschal of the Carolingian empire under the reign of Louis the Pious)
- Girart de Roussillon (or Gerard II of Paris), count of Paris, Roussillon, and Vienne.
In 801, Leuthard followed Emperor Louis the Pious in his expedition to Spain and participated in the capture of Barcelona, for which he received the county of Fezensac in the duchy of Aquitaine, where he became the first count. In 809, he was involved in the siege of Tortosa.
According to historian René Poupardin, Leuthard ended his days in the county of Paris.
His son Girart de Roussillon succeeded him as count of Paris.