or has occurred in Nigeria, the Nymba, Irigwe and some pre-contact Polynesian societies, though probably only among higher caste women. It is also encountered in some regions of Yunnan and Sichuan regions of China, among the Mosuo people in China (who also practice polygyny as well), and in some sub-Saharan African such as the Maasai people in Kenya and northern Tanzania and American indigenous communities. The Guanches, the first known inhabitants of the Canary Islands, practiced polyandry until Spanish colonization. The Zo'e tribe in the state of Pará on the Cuminapanema River, Brazil, also practice polyandry. Africa In the Lake Region of Central Africa, "Polygyny ... was uncommon. Polyandry, on the other hand, was quite common." Among the Irigwe of Northern Nigeria, women have traditionally acquired numerous spouses called "co-husbands". In August 2013, two Kenyan men entered into an agreement to marry a woman with whom they had both been having an affair. Kenyan law does not explicitly forbid polyandry, although it is not a common custom. Asia In the reign of Urukagina of Lagash, "Dyandry, the marriage of one woman to two men, is abolished." M. Notovitck mentioned polyandry in Ladakh or Little 'Tibet' in his record of his journey to Tibet. ("The Unknown life of Jesus Christ" by Virchand Gandhi). Polyandry was widely (and to some extent still is) practised in Lahaul-Spiti situated in isolation in the high Himalayas in India. Prior to Islam, in Arabia (southern) "All the kindred have their property in common ...; all have one wife" whom they share. The Hoa-tun (Hephthalites, White Huns) "living to the north of the Great Wall ... practiced polyandry." Among the Hephthalites, "the practice of several husbands to one wife, or polyandry, was always the rule, which is agreed on by all commentators. That this was plain was evidenced by the custom among the women of wearing a hat containing a number of horns, one for each of the subsequent husbands, all of whom were also brothers to the husband. Indeed, if a husband had no natural brothers, he would adopt another man to be his brother so that he would be allowed to marry." "Polyandry is very widespread among the Sherpas." In Bhutan in 1914, polyandry was "the prevailing domestic custom". Nowadays polyandry is rare, but still found for instance among the Brokpas of the Merak-Sakten region. In several villages in Nyarixung Township, Xigaze, Tibet, up to