In Korea, it is a cultural taboo to marry someone with the same surname due to Confucian beliefs that emphasize the importance of preserving one's lineage. Although there is no law prohibiting such marriages, couples who share the same surname may face legal challenges and confusion within families. The practice also impacts genealogy, social status, tradition, and modern society. However, exceptions exist for couples who can prove they are not related by blood or have different ancestral hometowns. As Korean society evolves, this practice is likely to become less important but will remain a part of Korean tradition and culture.