Named after Dmitriy Sergeevich Rozhdestvenskiy - Soviet physicist (1876-1940).
Rozhdestvenskiy is a large lunar crater on the far side , within one crater diameter of the north pole. It lies sandwiched. Just on the opposite side of the pole is the crater Peary. This formation is a large crater of the form called a walled plain. (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.