what is your grandmother or grandfather`s lastname?

问题描述:

what is your grandmother or grandfather`s lastname?

I don't feel comfortable with this question; it is actually weared to talk about those kind of personal stuff on Baidu

你的祖母和祖父姓什么?

你的祖父母姓什么的?
回答:
My grandmother's and my grandfather's lastname are both Wang.

你的祖母或祖父的姓是什么?