Sibling-in-law

Sibling-in-law is a gender-neutral term to refer to a brother-in-law or sister-in-law.

A brother-in-law (plural brothers-in-law) is the brother of one's spouse or the husband of one's sibling.

A sister-in-law (plural sisters-in-law) is the sister of one's spouse or the wife of one's sibling.

Additionally, persons who have siblings who are married, will refer to each other as "brother/sister-in-law" or "co-brother/sister-in-law" since each is the sibling-in-law of the other's spouse.

Family

History Household Nuclear family Extended family Conjugal family Matrifocal family Blended family Dysfunctional family Polyfidelitous families

Immediate family	Spouse Husband Wife Parent Father Mother Child Son Daughter Sibling Brother Sister

Extended family	Grandparent Grandchild Aunt Uncle Cousin Nephew and niece Common ancestor

Family-in-law	Parents-in-law Mother-in-law Father-in-law Sister-in-law Brother-in-law Siblings-in-law Son-in-law Daughter-in-law Children-in-law

Kinship	Adoption Affinity Consanguinity Disownment Divorce Estrangement Fictive kinship Marriage Nurture kinship

Lineage	Bilateral descent Family name Family tree Genealogy Heirloom Heredity Inheritance Matrilineality Patrilineality Pedigree chart Progenitor

Relationships	Agape (parental love) Eros (marital love) Filial piety Philia (friendly love) Storge (familial love)

Stepfamily	Stepparents Stepmother Stepfather Stepson Stepdaughter Stepchildren Step-grandfather Step-grandmother

Theories	Anti-Oedipus Kommune 1

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Sibling-in-law

See also