Named after Henry Cavendish - British chemist, physicist (1731-1810).
Cavendish is a lunar crater that is located in the southwest part , to the southwest of the larger crater Mersenius. It lies. The rim is heavily worn and the crater Cavendish E lies across the southwest rim. The smaller Cavendish A is intruding into the northeast rim. (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.