A Supreme Court precedent in 2022 ruled that when a child whose father died and whose mother had obtained the family name would be a member of his/her parent's body of clan groups in Korea. This precedent can be said to be a case that is in line with the a unanimous decision in that women also become members of body of clan groups in Korea. But Currently, Joseon's clan association, on which the clan is based, was artificially created according to the principle of the clan law, and is a group of people who are obligated to sacrifice the same ancestor, and the property given for that purpose is the clan property. The property clan body is a factor that can recognize the existence of the clan, and in reality, there were many donations by certain people, and it was originally a property that could not be disposed of. When considering the randomness of the establishment of the clan body, there is a problem with the idea that the his/her clan body is changed only by changing the family name. The fact that women can also be a member of korean clan body or be a member of a mother’s clan body is not considered to be achieved by equality in family life under the Constitution. Changes in family name under Article 781 (1) of the Civil Act shall be limited to the scope of the welfare of children and shall not involve the effect of changing one's position as a member of a clan body.