co-sibling-in-law

Etymology
From.

Noun

 * 1)  One's spouse's sibling's spouse; either of two (or more) people who marry siblings, from the perspective of the other.
 * 2)  One's sibling's spouse's sibling; either of two (or more) people whose siblings marry each other, from the perspective of the other.

Translations

 * Bikol Central:
 * Cebuano: bilas
 * Hiligaynon: bilas
 * Inupiaq: ,
 * Korean:
 * Malay:
 * Spanish:
 * Tagalog:
 * Tamil: (two or more men married to sisters of the same family)
 * Waray-Waray: bilas