Flavio Briatore
Flavio Briatore is a Formula One racing star and also owns a soccer team. He had a child with none other than Heidi Klum! Pretty interesting. The two were just starting to date when Heidi Klum became pregnant with their daughter, Leni. They broke up pretty quickly after her birth. Klum went on to marry singer Seal, and Briatore agreed to let Seal officially adopt his daughter.
President Grover Cleveland
This is pretty surprising, to say the least! President Grover Cleveland fathered a child with a woman named Mary Halpin. They named the baby Oscar Folsom Cleveland. Oscar was left at a mental asylum where Halpin had in fact given birth to him. He went on to be adopted by age 5 by James King and his wife.