Leudesius (assassinated 676) was the son of Erchinoald, Mayor of the Palace of Neustria, and his wife Leutsinde.
Leudesius inherited his father's properties on his death in 658. In 659, there was a dispute between the Archdiocese of Rouen and Abbey of Saint-Denis over his property.
When, in 673, the Burgundians under Leodegar defeated the mayor Ebroin and king Theuderic III, they exiled Ebroin to a monastery. The Austrasian mayor Wulfoald took over the power in Neustria, but fled back to Austrasia on the assassination of Childeric II in 675. The Neustrians turned to Leudesius to replace him. The next year, Ebroin returned. Leudesius and Theuderic III fled with the royal treasure to Baizieux, where Ebroin overtook them and had Leudesius murdered.
