Anville is a small, solitary lunar crater located in the north part of the Mare Fecunditatis. This is a circular, cup-shaped formation with a sharp edge and little appearance of wear. Some minor slumping has occurred in the eastern half of the interior wall. It was designated Taruntius G prior to being assigned a name by the IAU. (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.