Consanguinity

noun

1. Relationship by blood or by a common ancestor.
2. A close affinity or connection.
3. Relationship by blood; the relationship or connection of persons descended from the same stock or common ancestor, in distinction from affinity, or relationship by marriage.
4. In petrography, the genetic relationship existing between those igneous rocks of one locality which have been derived from a common parent magma by processes of differentiation.
5. The relation of persons by blood, in distinction from affinity or relation by marriage; blood relationship.

   "lineal consanguinity; collateral consanguinity"