But there is such things as 三姑 and 大婆. It's just a clever name for the app.Quote
Mr. K
> i thought 姑 denotes the paternal side of the family, not the maternal
You are right on this point.
By the way, there is no such thing as 三姑大婆. Don't trust the "apps" without verification.
I've used it and it seems pretty accurate.
Another app is called 爺爺奶奶。This one is also accurate.