贵姓

what is your surname?

verb Rare #30,660
what is your surname? A polite, formal way to ask someone's surname.
CH: 请问您贵姓?
EN: May I ask your surname?

请问你贵姓?

May I ask your surname?

这位大侠贵姓?

May I ask your name, hero?

— 少林足球 (2001)

没问题,请问你贵姓?

No problem. May I ask your surname?

— 蓝白红三部曲之蓝 (1993)