Relations by blood. 2. Nature has divided the kindred of every one into three principal classes. 1. His children, and their descendants. 2. His father, mother, and other ascendants. 3. His collateral relations; which include, in the first place, his brothers and sisters, and their descendants and, secondly, his uncles, cousins, and other relations of either sex, who have not descended from a brother or sister of the deceased. All kindred then are descendants, ascendants, or collaterals. A husband or wife of the deceased, therefore, is not his or her kindred.