Ava Lowle Lister, Baroness Ribblesdale was an American socialite. She was the first wife of Colonel John Jacob Astor IV and later married Thomas Lister, 4th Baron Ribblesdale.

John Jacob Astor IV was an American business magnate, real estate developer, investor, writer, lieutenant colonel in the Spanish–American War, and a prominent member of the Astor family. He was among the most prominent American passengers aboard RMS Titanic and perished along with 1,500 people when the ship sank on her maiden voyage. Astor was the richest passenger aboard the RMS Titanic and was thought to be among the richest people in the world at that time, with a net worth of roughly $87 million when he died.