Matilda of Louvain daughter of Lambert I and Gerberga of Lower Lorraine (0990–1049) Parents Lambert I, Count of Louvain Gerberga of Lower Lorraine Children Eustace II, Count of Boulogne Lambert II, Count of Lens Gerberga of Boulogne Siblings Lambert II, Count of Louvain Henry I, Count of Louvain Reinier van Leuven Partners Eustace I, Count of Boulogne