He had disgraced the family name.

　　他玷污了家族的名聲。

　　I don't want to bring shame on the family name

　　我不想玷污家族的名聲。

　　The teacher often mixed me up with another boy of the same family name.

　　老師常常把我和另外一個同姓的男孩搞混了。

　　May I know your surname? my family name is zhang.

　　您貴姓？免貴姓張。

　　I have disgraced my family's name

　　我讓家人蒙羞。