Isaac Newton was well versed in Ancient Greek. Page from Add. 3996, a notebook that Newton used as an undergraduate student from about 1661 to 1665 CE.

Page 88r from the Newton Papers. University of Cambridge Digital Library.
"Newton’s ‘Trinity College Notebook’ MS Add. 3996 was used by him as an undergraduate, from about 1661 to 1665."

https://cudl.lib.cam.ac.uk/view/MS-ADD-03996/1