Named after Gavril A. Tikhov - Russian astronomer (1875-1960).
Tikhov Crater is an impact crater in the Hellas quadrangle on Mars at 51.1°S and 254.3°W and is 111.0 km in diameter. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On Mars large craters are named after deceased scientists, writers and others who have contributed to the lore of Mars. Small creaters (less than 60km) are named after small towns and villages.