Answer:
Leeuwenhoek
Explanation:
The Dutch lens maker known for grinding a lens that magnified over 200 times the natural size is Antonie van Leeuwenhoek. He is celebrated for his pioneering work in microscopy and for being the first to observe and describe single-celled organisms, which he famously termed "animalcules," now known as microorganisms. Leeuwenhoek's advancements in lens-making and his meticulous observations significantly contributed to the fields of microbiology and cell biology.