plural of co-brother

One's colleague ("brother" in the same craft, occupation, or society). / (India) One's wife's sister's husband.

(uncommon) One's spouse's brother-in-law (one's spouse's sibling's husband), especially one's wife's sister's husband; either of two (or more) men who marry sisters, in relation to the other; the brother of one spouse in relation to the siblings of the other spouse.

plural of co-brother-in-law