What is Lineage?

Legal Definition
Properly speaking lineage is the relationship of persons in a direct line; as the grandfather, the father, the son, the grandson, &c.
-- Bouviers Law Dictionary
Legal Definition
Race; progeny; family, ascending or descending. Lockett v. Lockett, 94 Ky. 289, 22 S. W. 224.
-- Black's Law Dictionary