and whilst im at it, u grow up too. a child is a child, be it girl or boy. infact, girls dont have to change their names when they get married, its a very desi thing to do.. arabs dont.. they keep their fathers name.. so continue the family name by not having ure girls change their name once they get married :)
p.s?
I dont think you got it. Even if the girls keep their fathers name after getting married, do you realize their kids will keep their fathers name, and so the family name ends right there after the girls?