Doris Duke
Doris was 14 when she sued her mom for controlling her trust fund. At 12, the girl inherited her father’s (Buchanan) tobacco fortune after he died. Her mother wanted to sell some family assets, when Doris decided to settle the disagreement in court.
Doris lived until 80! She also left $1.2 billion to her butler, Bernard Lafferty before dying, which raised many eyebrows.