Siem Heiden
Simon "Siem" Heiden (12 March 1905 – 3 August 1993) was a Dutch speed skater who competed in the 1928 Winter Olympics. He was born in IJsselmonde and died in Rotterdam. In 1928, he finished eleventh in the 5000 metres event, 18th in the 1500 metres competition, and 27th in the 500 metres event. When he broke the 5000 meters world record in 1933, he was a member of athletic and football club Feyenoord. The chairman of the club, Leen van Zandvliet, congratulated him for his performance.