Conversation so far:
Where does George Gershwin's lineage descend from?
Gershwin was of Ukrainian Jewish and Lithuanian Jewish ancestry.
Are there any other interesting aspects about George Gershwin's lineage?
His grandfather, Jakov Gershowitz, was born in Odessa and had served for 25 years as a mechanic for the Imperial Russian Army to earn the right of free travel

Question: Does he have any other known linage?
Self-contained rewrite: Does George Gershwin have any other known linage?