Synonyms for Line Of Descent (same or very similar meaning)
WordNet sense 1 (the kinship relation between an individual and the individual's progenitors):
descent, lineage, filiation, lineageWordNet sense 2 (the descendants of one individual):
ancestry, bloodline, blood, line, origin, parentage, pedigree, stock, stemmaFrom the ODE community, based on WordNetadd/edit