Where does “باجناق” come from?

باجناق (Ottoman Turkish) comes from Azerbaijani bacanaq, from Turkish bacanak, from Ottoman Turkish باجاناق — husbands of sisters.

Ancestry of “باجناق”, step by step

StepLanguageWordMeaning
1Azerbaijanibacanaqhusband of one's wife's sister, co-brother-in-law
2Turkishbacanakhusband of one's wife's sister
3Ottoman Turkishباجاناقhusbands of sisters
Every word from Ottoman Turkish باجاناقEvery word from Turkish bacanakEvery word from Azerbaijani bacanaq