Winnaretta Singer, Princess Edmond de Polignac (8 January 1865-26 November 1943), was an important musical patron and heir to the Singer sewing machine fortune. She was the 18th of the more than 20 children of Isaac Singer. Her mother was his second wife, Isabelle Eugenie Boyer Summerville. Wikipedia
The definitive Wikipedia entry for Winnaretta Singer. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Winnaretta_Singer