Deutsch is a lunar crater on the far side. It lies to the southwest of the larger crater Seyfert. About one crater to the east-northeast is Polzunov. Its name comes from Armin Joseph Deutsch, an American astronomer and science-fiction author. (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.