Johannes Heurnius was a Dutch physician and natural philosopher. Wikipedia
Born: February 4, 1543, Utrecht, Netherlands
Died: August 11, 1601 (age 58 years), Leiden, Netherlands
Grandchildren: Margreta van Berck, Jacob van Berck Heer van Heesdorp en Mijdrech, and Johanna van Heurn
Children: Otto Heurnius, Justus Heurnius, and Isabella van Heurn
Partner: Christina Beyer
Parents: Geertruyt van Velsen and Otto Janszoon van Hoorn
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