Lucia-Mahaut
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Lucia-Mahaut of Blois (d.1120) was daughter to Stephen, Count of Blois and Adela of Normandy. She was married to Richard d'Avranches, 2nd Earl of Chester. Both she and her husband joined William, heir to the English Henry Beauclerc aboard the doomed White Ship. The ship went down, drowning all but one boy, on November 25, 1120.