Lucia-Mahaut de Blois was born circa 1097 in Blois to Stephen II, Count of Blois (c1045-1102) and Adela of Normandy (c1062-1138) and died 25 November 1120 White Ship Disaster of drowning. She married Richard d'Avranches, 2nd Earl of Chester (1094-1120) . William I of England (1027-1087), Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Hugh Capet (c940-996)/s, Rollo of Normandy (860-932)/s.
White Ship Disaster
The White Ship was a vessel that sank in the English Channel near the Normandy coast off Barfleur, on 25 Novemeber 1120. Only one of those aboard survived. Those who drowned included William Adelin, the only legitimate son and heir of King Henry I of England, his half-sister Matilda, and his half-brother Richard. This tragedy caused a major succession crisis for the House of Normandy.