Collateral Consanguinity
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
That relationship which subsists between persons who have the same ancestors, but not the same descendants; who do not descend one from the other.
2 Bl. Comm. 203.
The essential fact of consanguinity (common ancestral blood) is the same in lineal and collateral consanguinity, but the relationship is aside from the direct line. Thus, father, son, and grandson are lineally related; uncle and nephew, collaterally.