Named after David Hume - Scottish philosopher (1711-1776).
Hume is a small lunar crater that lies along the eastern limb , along the southeast edge of Mare Smythii. It is located just on the far side , but it is often brought into sight from Earth due to libration. Hume lies just to the west-northwest of the much larger Hirayama, and to the northeast of the flooded crater Swasey. Hume has been flooded by flows of basaltic lava, leaving only a slender rim projecting above the surface. (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.