Named after Grigory Moiseevich Kramarov - Soviet space scientist (1887-1970).
Kramarov is a small lunar impact crater on the far side. It lies just beyond the western limb, at the far edge of the region that is brought into view during favorable librations. The crater is situated in the northern part of the Montes Cordillera, the outer ring of the mountains that surround Mare Orientale. In the past this crater was designated Lents K, a satellite of Lents which lies to the northwest, before being named by the IAU. (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.