Himyarites

The Himyarites originally worshiped most of the South-Arabian pantheon, including Wadd, ʿAthtar, 'Amm, and Almaqah. Since at least the reign of Malkikarib Yuhamin (c. 375–400 CE), Judaism was adopted as the de facto state religion. The religion may have been adopted to some extent as much as two centuries earlier, but inscriptions to polytheistic deities ceased after this date. It was initially embraced by the upper classes and, over time, possibly by a large proportion of the general population. Native Christian kings ruled Himyar from 500 CE to 521–522 CE. Christianity itself became the main religion after the Aksumite conquest in 530 CE.