Secondly, ask, "What's your mother's name?" Probably not in line with ancient etiquette. Because after the mother marries her father, she legally has the same surname as her father. So if you must ask, you should ask, "Why was your mother a woman when she got married?" "What is your mother's maiden name?" However, if you ask this question, you can't see respect for the other mother in the sentence pattern, so you often have to put it another way, such as "Let your grandfather respect your surname?" Or "What's your uncle's last name?" That is, change the object to the other person's grandfather or uncle, because they have the same surname as the other mother.
But personally, I feel that the ancient gameplay is too troublesome and not feminist at all. Unless it's the answer to the exam, it's still "what's your mother's last name?" Is it the most practical, or is it better to use the affectionate tone used by northerners: "What is my mother's surname?" . If you are a stranger, or if you must use honorifics, you can use "Dare to ask your mother's real name?" "What's your mother's last name?" Wait a minute.