Noun
(uncountable) The quality or condition of being a descendant.
(countable) Descendants considered collectively.
(uncountable) The opposite of ascendancy; the condition of being in the process of losing power or control.
Source: en.wiktionary.orgNote that descendancy of the Julii Caesares before the generation of Julius Caesar's grandfather is in part conjectural, but as presented by scholars. Source: Internet
The claims might have been made to ensure a descendancy of nobility, considering only a high placed family can be made such a position. citation Kings of the Akkad Dynasty. Source: Internet