Christian I, Count of Oldenburg
Christian I, known as "the Quarrelsome" was Count of Oldenburg from 1143 to 1167. He was son of Elimar II, Count of Oldenburg and his wife Eilika von Werl-Rietberg, daughter of Count Heinrich von Rietberg.Issue
He is a direct male-line ancestor of Queen Margrethe II of Denmark and of King Harald V of Norway, and also of Prince Philip, Duke of Edinburgh, and thus of Charles, Prince of Wales, the heir apparent to the British crown.
