Andreas Cleyer (27 June 1634 – between 20 December 1697 and 26 March 1698) was a German physician, pharmacist, botanist, trader and Japanologist.
Andreas Cleyer could be called a "soldier of fortune." He began as a modest soldier, and he made his fortune and reputation during the course of a career. He rose in the ranks of the Dutch East India Company (Vereenigde Oostindische Compagnie), becoming a respected and well-known figure in the VOC's Batavian society.
Cleyer added to western botanical, zoological and medical knowledge in the course of his time in Southeast Asia. His collecting and categorizing activities were noteworthy in their number and extent. His name can be found in many 17th century travel accounts (e.g. Heinrich Muche, Johann Wilhelm Vogel, Johann Konrad Rätzel).
Cleyer's published work is still available in rare book collections.
1683: Decuria II, Annus I
1684: Decuria II, Annus II
1685: Decuria II, Annus III
1686: Decuria II, Annus IV
1687: Decuria II, Annus V
1688: Decuria II, Annus VI
1689: Decuria II, Annus VII
1690: Decuria II, Annus VIII
1691: Decuria II, Annus IX
1692: Decuria II, Annus X
1695: Decuria III, Annus II
1696: Decuria III, Annus III
1700: Decuria III, Annus V & VI