Countess Emilia Antwerpiana of Nassau (Antwerp, 9 December 1581 - Landsberg, 28 September 1657) was the sixth and youngest daughter of William the Silent and his third wife, Charlotte of Bourbon.

[2] On 4 July 1616, Emilia Antwerpiana married Frederick Casimir, Count Palatine of Zweibrücken-Landsberg (1585–1645) and settled with him in Landsberg.

In 1621, Emilia Antwerpiana and Frederick Casimir had to flee Landberg for Strasbourg during the Thirty Years' War.

The flight caused long standing economic problems, and for many years she tried to get access to her inheritance and asked her siblings for money.

[3] Her sister Charlotte Brabantine finally arranged for her to live at the castle Montfort in France.