For instance, in the case of the family name of Kim, hongan was an effective measure in distinguishing clans, since there was the royal family of Gimhae Gaya (in Gaya) and the royal family of Silla, which were clans with completely different lineage.
たとえば金姓の場合、金海伽耶(駕洛国)王族系と新羅王族系と全く血統の違う氏族が在るために本貫は氏族を区別する為の有効な手段であった。