Conversation so far:
Was Ancestors a title of a song by George Gershwin?
What was George Gershwin's ancestry?
George Gershwin was of Russian Jewish and Lithuanian Jewish ancestry.
Did George Gershwin change his last name?
George Gershwin changed the spelling of his surname to 'Gershwin' around the time he became a professional musician.

Question: Did he have any siblings?
Self-contained rewrite: Did George Gershwin have any siblings?