Named after Roy Healy - American rocketry scientist (1915-1968).
Healy is a lunar crater that lies past the northwestern limb , on the far side relative to the Earth. The rim is only slightly worn, but a small crater lies across the northeastern side. The inner walls and interior floor are featureless, with no impacts of note. (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.