《论衡·卷二十五·诘术篇》
制定本姓则根据出生时的情况，制定氏姓则根据职业、官职和祖父的字，根据口的开合协调姓的道理在哪里呢？
吏乎！王父字乎！以本姓则用所生，以氏姓则用事、吏、王父字，用口张歙调姓之义何居？
The given name is based on the circumstances at birth, while the clan name is based on occupation, official title, and the grandfather's style name. Where is the logic in harmonizing the surname based on the opening and closing of the mouth?