Named after Umberto Nobile - Italian artic explorer (1885-1978).
Nobile is a lunar crater that is located near the southern pole. It lies to the south of the crater Scott, along the western rim of Amundsen. Between Nobile and the southern pole lie the smaller craters Shoemaker and Faustini. This is an eroded crater formation that is almost constantly cloaked in deep shadows. (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.