monarch anymore, Article 1a), or by royal decree approved by the Council of State (Article 5). This last scenario could happen, for example, if a royal house member marries without the consent of the Dutch Parliament. For example, this happened with Prince Friso in 2004, when he married Mabel Wisse Smit. Family tree The lineage of the House of Nassau can be traced back to the 10th century. A detailed family tree can be found here. A detailed family tree of the House of Orange-Nassau from the 15th century can be found on the Dutch Wikipedia at Dutch monarchs family tree. The main house of Orange-Nassau also spawned several illegitimate branches. These branches contributed to the political and economic history of England and the Netherlands. Justinus van Nassau was the only extramarital child of William of Orange. He was a Dutch army commander known for unsuccessfully defending Breda against the Spanish, and the depiction of his surrender on the famous picture by Diego Velázquez, The Surrender of Breda. Louis of Nassau, Lord of De Lek and Beverweerd was a younger illegitimate son of Prince Maurice and Margaretha van Mechelen. His descendants were later created Counts of Nassau-LaLecq. One of his sons was the famous general Henry de Nassau, Lord of Overkirk, King William III's Master of the Horse, and one of the most trusted generals of John Churchill, 1st Duke of Marlborough. His descendants became the Earls of Grantham in England. Frederick van Nassau, Lord of Zuylestein, an illegitimate son of Frederick Henry, Prince of Orange, gave rise to the Earls of Rochford in England. The 4th earl of Rochford was a famous English diplomat and a statesman. In 1815, William VI of Orange became King of the Netherlands. This summary genealogical tree shows how the current Royal house of Orange-Nassau is related: Coats of Arms The gallery below show the coats of arms used by members of the house of Orange-Nassau. Their growing complexity and use of crowns shows how arms are used to reflect the growing political position and royal aspirations of the family. A much more complete armorial is given at the Armorial of the House of Nassau, and another one at Wapen van Nassau, Tak van Otto at the Dutch Wikipedia. The ancestral coat of arms of the Ottonian line of the house of Nassau is shown right. Their distant cousins of the Walramian line added