Polykarp Leyser IV (1690 – 1728), German Lutheran theologian, philosopher, physician, lawyer and historian
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Polykarp Leyser II (1586 – 939), German Lutheran theologian, superintendent in Leipzig
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Polykarp Leyser III (1656 – 1725), German Lutheran theologian, superintendent, chaplain and orientalist
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Polykarp Leyser the Elder (1552 – 1610), German Lutheran theologian, superintendent in Braunschweig
Polykarp Leyser IV (4 September 1690, Wunstorf - 7 April 1728, Helmstedt) was a German Lutheran theologian, philosopher, physician, lawyer and historian.