A brother by blood: a brother-german or half-brother, as distinguished from step-brothers.
An unrelated male considered to share such a strong relationship generally.
An unrelated male considered to share a brother-like relationship established by a ceremonial sharing of blood in some cultures.
The sister of the spouse of one's sibling.
The wife of the sibling of one's spouse.
The wife of one's sibling.
The sister of one's spouse.