In Eastern Bhutan, the Tsangla (Eastern Bhutanese dialect) term Serga Mathang and Khothkin which directly translates to “golden cousins” refers to consanguineous marriage with the child of a parent’s sibling. The name serga mathang uses a metaphor for cross-cousin marriage tradition gold (ser) to suggests that marrying into a consanguineous family is similar to amassing a significant amount of money. In Tsangla kinship terminologies, Mathang denotes a female cross-cousin while Khothkin denotes a male cross-cousin. On a related note, we should be aware that in Tsangla kinship terminologies, the terms Mathang and Kothkin are used to refer to one's brother's wife and sister's husband, respectively, even though they are not blood relatives. However, the absence of the prefix serga, golden, indicates that these terms are used for non-cousin relationships. There are three types of cross-cousin marriage in the Eastern districts of Bhutan. A man marries the daughter of his mother's brother (ajang) in a matrilateral cross-cousin marriage. In a patrilateral cross-cousin marriage, a man marries the daughter of his father's sister (ani). In a bilateral cross-cousin marriage, a man marries a woman who is also the daughter of his father's sister and mother's brother. As per the research done by Dorji (2003), The mother’s brother is known in the Tshangla society as Ajang ngama rinpoche, which translates to "precious maternal uncle," and his nephews (tshowo) are expected to appease him by carrying out his wishes, which are typically fulfilled by marrying his daughters. According to social custom, nephew marriages cannot go against the wishes of their maternal uncles, who are given the same respect as the couple's biological parents. Matrilocal residence laws frequently compel men to move to their uncle’s house to become the husband of the uncle’s daughter. If nephews happen to marry outsiders, this custom physically separates them from maternal uncles, depriving them of the respect and assistance they would typically receive from their nearby nephews. For that reason, it is believed that the Ajang (uncle) encourages marriages among family members. The social obligation that maternal uncles have toward their nephews fosters their mutually emotional bonds, which may account for the frequency of matrilateral cross-kin partnerships. Unlike exogamous marriage ceremonies, a cross-cousin marriage ceremony typically does not include an elaborate or formal process, the consanguineous couple simply elopes. The prevalence of informal pre-elopement interactions for cross-cousin couples, as well as social values associated with cross-cousin marriage typically results in a union that is approved by the parents. To understand the concept of pre-elopement, he idea of Chungnyen (childhood engagement) is when both sets of parents make a vow to support marriage between their children in the future in order to preserve the wealth between the two close families. Moreover, some parents would negotiate cross-cousin weddings without official demands for bridegroom payment, while others may not even arrange marriage ceremonies. Historically, cross-cousin marriages were typically permitted by the parents because of the associated social values. Despite the fact that this marriage custom predominated in the past, it is largely on the decline because of globalization. Modern legal rules start to question the taboo nature of such marriages as potential incest. Moreover, medical and educational sectors led to a diminishing of cross-cousin marriage customs in Bhutan because it is believed that a cross-cousin union enhances the likelihood that undesirable genes will be manifest in the offspring. A child’s defects in phenotypic traits are the result of a mix of potentially harmful genes received from married cousins. An offspring of married cousins may exhibit positive qualities and good health due to the pairing of favorable genes, but not to the same extent as those of unrelated spouses.