Sibling-in-law
Spouse's sibling or sibling's spouse / From Wikipedia, the free encyclopedia
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"Brother-in-law" and "Sister-in-law" redirect here. For other uses, see Brothers in Law (disambiguation) and Sisters in Law (disambiguation).
A sibling-in-law is the spouse of one's sibling, the sibling of one's spouse or the person who is married to the sibling of one's spouse.[1]
Example of the spouse of one's sibling | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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David and Jonathan became brothers-in-law when David married Jonathan's sister Mary Anne |
More commonly, a sibling-in-law is referred to as a brother-in-law for a male sibling-in-law and a sister-in-law for a female sibling-in-law.
Sibling-in-law also refers to the reciprocal relationship between a person's spouse and their sibling's spouse. In Indian English this can be referred to as a co-sibling (specifically a co-sister, for the wife of one's sibling-in-law,[2] or co-brother, for the husband of one's sibling-in-law[3]).