The capital city of Jakarta is one of the places that most people in Indonesia want to visit, including people from West Southeast Maluku ethnicity, Maluku Province. Not a few migrants from West Southeast Maluku who live in Jakarta when returning to their hometowns invite their relatives to try their luck in the capital city of Jakarta. They come to settle down while still preserving the customs and culture of the people of West Southeast Maluku better known as the Tanimbar Islands. The purpose of this paper is to reveal the duan lolat culture that is still preserved by migrant communities from the Tanimbar islands even though they have migrated to the capital city of Jakarta and its surroundings. One of them is the value of kinship called Duan Lolat. The research was conducted using the historical method. The sources used were written sources such as literature studies, documents, and interviews with traditional leaders and Tanimbar people in Jakarta. The results of this study show that Duan and Lolat are social statuses derived from marital relationships, and marriage is the basis for determining the social status of Duan and Lolat. In marriage, the party who gives the daughter will in turn become Duan, while the party who receives the daughter will become Lolat. After marriage, the female family becomes Duan while the male family, the offspring of the married couple, becomes Lolat from the female family. The institutionalization of the Duan Lolat value occurs throughout human life, starting from birth, marriage, house construction, to death.