I became a door-to-door son-in-law Who should the child be named after?

Children should take their mother's surname.

Door-to-door son-in-law: the so-called "inverted door", whose scientific name is "adoption", is a folk custom.

It is usually said that the man becomes a member of the woman's family and is called the "son-in-law".

The traditional custom is that children should take the family name of the woman after the son-in-law comes to the door. In fact, this is a bad habit of discriminating against the son-in-law. According to the law, children can choose any surname.