 It was divided into a handful of regions, controlled by particular kin groups, of which the Cenél nÓengusa controlled Jura and Islay.The kingdom thrived for a few centuries, and formed a springboard for Christianisation of the mainland.It is believed that Jura may have been Hinba, the island to which the 6th-century missionary, Columba, retreated from the monastic community he founded on Iona, when he wished for a more contemplative life.