In the past, marriage outside the tribe was forbidden for both women and men.

In most countries, marriage between brothers and sisters is forbidden.

How the marriage had been forbidden by our fathers but of course they came round in the end.

According to custom, marriage is forbidden between two members of the same clan.

She had been forced out of nursing school because marriage and pregnancy were forbidden.

Medieval Church law at the time forbade marriage within seven degrees.

Each of these groups intermarry, but marriage is forbidden within the clan.

As all the members of a band were related, marriage between a man and a woman within the same band was forbidden.

It is unclear, however, whether members were forbidden marriage or liaisons with women outside the walls.