An Ancient Legacy of Sovereigns, Soldiers, and Servants of the Cross. The House of Joinville played a very important role in France during the Middle Ages and also served valiantly in the Crusades. They became allied with some of the most powerful families of Europe, the main Joinville title eventually passing to the House of Bourbon, where it remains today in the Orleans branch. Descendants of the ancient House of Joinville have various spellings of their name in addition to Joinville, including Geneville, Johnson, and Johnston. They are scions of a great lineages, providing insight and wisdom and indeed serve as a compass to the modern world.