What is a man's name?

Answer 1

Althought it is rare, there is no reason or law that says a man cannot take his wife's last name after marriage.. While it is tradition to use the man's last name, in some cases men do will take their wives names after marriage or hyphenate the two. In cases where a man has taken his wife's name in marriage, he would use the gender neutral term "birth name", since he is a male and not a maid.

The only reason why it's not the other way around is because of cultural gender bias.