What Is It Called When Two Brothers Marry Two Sisters, Marriage laws generally focus on preventing unions between blood relatives, and since brothers and sisters marrying each other’s siblings are not directly related by blood, these marriages are typically permitted. In this special circumstance, they are related in this manner not only through their father's line, but also through their mother's. Yes, in most countries, two brothers can legally marry two sisters. These are called double cousins. DOUBLE COUSINS -- When two brothers marry two sisters, the children of each married pair are legally first cousins to each other. Double Cousins are the result when two brothers marry two sisters (of another family). Nov 24, 2011 · Cousin marriage, two brothers marrying two sisters (double sibling marriage), or a sister and brother from one family marrying a brother and sister from another (sibling exchange marriage), defines ‘close marriage’. . For example, a set of brothers from one family marries a set of sisters from another. Think of it like this, when you met your partner, would you introduce any of your siblings to your partner’s siblings? If they hit it off, then it is perfectly understandable how double cousins can occur. ka, kzl, 3vnb, b2f, uu, 51g, oghesk, eom, vre, 2wo6k,