means Sir Isaac Newton, the English mathematician and physicist (1643–1727) who formulated the laws of motion and universal gravitation; also the SI unit of force named in his honor.

from The surname Newton is plain English geography — from the Old English nīwe (new) and tūn (settlement or farmstead), literally 'the new town,' one of the most common place-names in England. The man made it immortal, and after his death the scientific world repaid the favor: in the 20th century, when the metric system needed a name for the unit of force, they borrowed his — one newton being the push needed to accelerate one kilogram by one meter per second squared. Fittingly, the apple he supposedly watched fall hits the ground with a force of about one newton.