Marapu
The Marapu religion (also known as Marafu in Sumba) is a form of ancestral religion that is practiced mainly in the island of Sumba in Indonesia. Marapu is also practiced in many more remote areas of Sumba and Flores. Both the Christians and Muslims on these islands tend to combine their faiths with Marapu. Since Marapu, like Kaharingan of the Dayaks, is not an official religion of Indonesia, and all Indonesian citizens are required to identify as of one of a member of the sanctioned religions by law, members have chosen either Christianity or Islam to self identify.
They believe in temporary life in the world and eternal life in the Doomsday, the world of spirits in Marapu heaven — Prai Marapu. The word Marapu means: Firstly, the occupants of the eternal heaven, who lead a similar existence to men. They live in couples and one of these couples is the ancestor of the Sumbanese. Secondly, the spirits of Sumbanese ancestors in Prai Marupu. Thirdly, the spirits of their relatives. Fourthly, all spirits dwelling the universe. Marapu has mysterious and magical authority over human life.