Raynald of Châtillon, also known as Reynald, Reginald, or Renaud, was Prince of Antioch—a crusader state in the Middle East—from 1153 to 1160 or 1161, and Lord of Transjordan—a large fiefdom in the crusader Kingdom of Jerusalem—from 1175 until his death, ruling both territories iure uxoris. The second son of a French noble family, he joined the Second Crusade in 1147, and settled in Jerusalem as a mercenary. Six years later, he married Princess Constance of Antioch, although her subjects regarded the marriage as a mesalliance.