Named after Arnold Henry Guyot - Swiss-born American geographer, geologist (1807-1884).
Guyot is a lunar crater. It is separated from the crater Kostinskiy to the northeast by only a few kilometers of rough terrain. To the west-southwest lies the crater Lobachevskiy and to the east-southeast is Ostwald. This is a worn and eroded crater with an outer rim that has been somewhat distorted in shape due to nearby impacts. (wikipedia entry)