Willie is a true American icon, and it runs deep in the bloodline.
Among their ancestors, they believed in wedding brother to sister to preserve the bloodline.
In a tiny, remote Chinese village, an ancient Roman bloodline may live on.
Macedonia was a vital (also corrupt and lucrative) bloodline, connecting Greece to Serbia (through the Vardar river).
bloodline blood·line (blŭd'līn')
The direct line of descent; a pedigree.