Rosalie "Rosa" Wanderone

"In his autobiography, Fats also mentions that another sister, Rosa, died tragically young. He wrote that her death came shortly before he and wife Evelyn were married, and that the date of that marriage was May 7, 1941. Separate records show Rosa was born in 1907, which means she would have been about 34 years old. Corwin had no details about the circumstances of Rosa’s death, although he says a grave marker puts her final day as March 31, and that the grave marker is next to his own mother’s, back in New York. "

http://www.billiardsdigest.com/new_untold_stories/0908/fats_2.php