Slack, the granddaughter of Ernest Oppenheimer and elder sister of Nicky Oppenheimer, owns interests in dozens of ompanies.
Mary Oppenheimer
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From Allan Gray to Patrice Motsepe, meet the 10 most generous South African philanthropists ever.
Slack, the granddaughter of Ernest Oppenheimer and elder sister of Nicky Oppenheimer, owns interests in dozens of ompanies.
From Allan Gray to Patrice Motsepe, meet the 10 most generous South African philanthropists ever.