Question: When did Countess Albertine Agnes Of Nassau's mother die?
Sentence (from "Countess Albertine Agnes of Nassau"): Albertine Agnes of Nassau (April 9, 1634 – May 26, 1696), was regent of Friesland, Groningen and Drenthe during the minority of her son Henry Casimir II, Count of Nassau-Dietz.
Relevant evidence: No