genearchn.

/ˈdʒɛnɪɑːk/Etymology: < Greek γενεάρχης founder of a family, < γενεά race + -άρχης : compare genarcha n.
1727 in N. Bailey II
1860 J. E. Worcester ; and in mod. Dicts.
This entry has not yet been fully updated (first published 1898; most recently modified version published online September 2021).