Milton is a crater on Mercury. It has a diameter of 186 kilometers. Milton is named for the English poet John Milton, who lived from 1608 to 1674. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On Mercury they are named after deceased artists, musicians, painters, and authors who have made outstanding or fundamental contributions to their field and have been recognized as art historically significant figures for more than 50 years.
Image Source. Marker locations are approximate and may not always appear to align with image on map.