scion

Concise Oxford English Dictionary © 2008 Oxford University Press:
scion /ˈsʌɪən/

▶noun

• 1 a young shoot or twig of a plant, especially one cut for grafting or rooting.

• 2 a descendant of a notable family or one with a long lineage.

– origin ME: from OFr. ciun ‘shoot, twig’, of unknown origin.