The Hebrides were now part of Kingdom of the Isles, whose rulers were themselves vassals of the Kings of Norway. The Kingdom had two parts: the ' or South Isles encompassing the Hebrides and the Isle of Man; and the ' or North Isles of Orkney and Shetland. This situation lasted until the partitioning of the Western Isles in 1156, at which time the Outer Hebrides remained under Norwegian control while the Inner Hebrides broke out under Somerled, the Norse-Celtic kinsman of the Manx royal house.