3. Bertold Wiesner – 600 children
There is a big difference between adding in a secret ingredient to a Taco Bell burrito for your buddies and what Bertold Wiesner did for his patients. The Austrian-born physiologist put a little bit of himself in helping his patients at a fertility clinic set up by him and his wife. His goal was to help London couples in the 1940s find high IQ sperm donors, but Wisener decided that finding actual donors was too much work and decided to make deposits on their behalf.
Two of his children found they were conceived by artificial insemination and that Wiesner was their father. Further investigations have revealed that before Wiesner’s death in 1972, he fathered nearly 600 children. The number of children Wiesner claimed legitimately? One.