Conversation so far:
Where does George Gershwin's lineage descend from?
His birth certificate identifies him as Jacob Gershwine, with the surname pronounced 'Gersh-vin' in the Russian and Yiddish immigrant community.
Are there any other interesting aspects about this article?
He was named after his grandfather.
Does he have any other known linage?
CANNOTANSWER.

Question: What side of his family is Russian?
Self-contained rewrite: What side of George Gershwin's family is Russian