Monogamy is expected to be observed during marriage—at least among the wife anyway.
The family of the groom approves the marriage and organizes the wedding for him.
So, within a family you will see different last names.
Couples have traditionally been expected to live with the husband’s parents until they could afford a place of their own.
In the old days the bride was usually several years older than the groom.
After the wedding party, the bride goes to live with her husband's family.
The Kinh attach much importance to fidelity and the virtues of the bride.
In the past Vietnamese marriages were arranged through matrimonial agents (mai-dongs) who brought the two families together and arranged the question of the wedding portion (bride price).