Lyot (Moon)

Named after Bernard Ferdinand Lyot - French astronomer (1897-1952).

Lyot stands out on the flat plains of Vastitas Borealis, which is generally flat and smooth with few large craters. Lyot is the deepest point in Mars's northern hemisphere. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.