Johanna van der Aa, heiress of Grimberghe 1380 - 1421 (1380–1421) Parents Isabella de Looz, Heiress of Agimont and Ayschove Jan van der Aa, Heer van Grimberghe Children Johanna van Boutershem, Heiress of Bergen op Zoom and Grimberghe Siblings Jean II de Walcourt, Seigneur de Rochefort