Adelaide de Crépy was a notable figure in the medieval period, known for her role as a noblewoman in the Capetian dynasty of France. She was born around the year 1000 and was the daughter of Hugh de Crépy, a prominent nobleman. Her lineage connected her to influential families, which played a significant role in the political landscape of the time. Adelaide married Renaud I of Nevers, further strengthening her family's alliances. Through her marriage, she became the mother of several children, including Hugh II of Nevers, who continued the family's legacy. Her life reflects the intricate web of noble connections that characterized the feudal system in medieval France.