Named after Mentore Maggini - Italian astronomer (1890-1941).
Maggini Crater is an impact crater in the Arabia quadrangle on Mars at 28.0° N and 350.6° W and is 143.0 km in diameter. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On Mars large craters are named after deceased scientists, writers and others who have contributed to the lore of Mars. Small creaters (less than 60km) are named after small towns and villages.