Vallis Bouvard (Moon)

Named after Alexis Bouvard - French astronomer, mathematician (1767-1843).

Vallis Bouvard is a 284-km-long valley , centered at 38.3°S 83.1°W / -38.3; -83.1. This is one of several such valleys that radiate away from the southeast edge of the Mare Orientale circular impact basin, the other two being Vallis Inghirami and Vallis Baade. It was formed by a secondary crater chain. (wikipedia entry)

A vallis is a valley. On the Moon they are named after nearby craters or other landforms.