Adelaide of Tours (c.820-c.866) was a daughter of Hugh of Tours and his wife Ava.
She married Conrad I, Count of Auxerre, with whom she had at least two children, Hugh and Conrad the Younger.
After his death she probably married Robert the Strong, whose children Odo and Robert I of France are perhaps hers.
Since Robert was born in 866, well after her first husband died, he is more likely to be her offspring. His grandson was Hugh Capet, the first King of the House of Capet.