Named after Florian Cajori - American mathematician (1859-1930).
Cajori is a lunar crater that is located in the southern hemisphere on the far side. It lies to the southwest of the walled plain Von Kármán, and to the east-southeast of the crater Chrétien. The outer rim has been heavily damaged by impacts, leaving a disintegrating outer perimeter that is irregular and notched along its edges. Several small craters lie along the edge, with the most notable being Cajori K attached to the southeast rim. (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.