John C. Breckinridge
Mary Marvin Breckinridge was born on October 2, 1905 in New York City, to John C. Breckinridge, of the prominent Kentucky Breckinridge family, and Isabella Goodrich Breckinridge, daughter of B. F. Goodrich. Her great-grandfather, John C. Breckinridge, was Vice President of the United States under James Buchanan, a Confederate general and Confederate Secretary of War. Her godmother and cousin was Isabella Selmes Greenway, Arizona's first Congresswoman.