Wilma “Billie” Tisch, a matriarch of one of America’s wealthiest families and leader of its philanthropy to Jewish causes and to New York City cultural and medical institutions, has died. She was 98. (Bloomberg) — Wilma “Billie” Tisch, a matriarch of one of America’s wealthiest families and leader of its philanthropy to Jewish causes and to New York City cultural and medical institutions, has died. She was 98.