Jan Keizer may refer to:
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Jan de Koning (politician) (1926–1994), Dutch politician
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Jan de Koning (footballer)
Jan de Koning (born October 7, 1949, in Amsterdam, Netherlands) is a Dutch footballer, scout and manager. He played as a forward. After working as assistant technical director at Liverpool F.C.'s Academy, he now scouts for Portsmouth F.C. in E ...
(born 1949), Dutch footballer
{{Hndis, De Koning, Jan