Christian I, Count of Oldenburg should not be confused with Christian I of Denmark.
Christian I, known as "the Quarrelsome" (died 1167[1]), was Count of Oldenburg from 1143 to 1167. He was son of Elimar II, Count of Oldenburg and wife Eilika von Werl-Rietberg,[2] daughter of Count Heinrich von Rietberg.[3]
He married Kunigunde and had one son, Maurice, Count of Oldenburg (c. 1145 - c. 1211)