Robert the Strong was the father of two kings of West Francia: Odo and Robert I of France. His family is named after him and called the Robertians. In 853, he was named missus dominicus by Charles the Bald, King of West Francia. Robert the Strong was the great-grandfather of Hugh Capet and thus the ancestor of all the Capetians.

Odo was the elected King of West Francia from 888 to 898. He was the first king from the Robertian dynasty, the parent house of the House of Capet. Before assuming the kingship, Odo was the count of Paris. His reign marked the definitive separation of West Francia from the Carolingian Empire, which would never be reunited.