Mons Hadley (Moon)

John, British instrument maker (1682-1744).

Mons Hadley is a massif in the northern portion of the Montes Apenninus, a range in the northern hemisphere. To the southwest of this mountain is a valley that served as the landing site for the Apollo 15 expedition. To the southwest of this same valley is the slightly smaller Mons Hadley peak with a height of about 3.5 km. (wikipedia entry)

A mons is a mountain. On the Moon they are named after terrestrial mountain ranges, nearby craters, and deceased scientists who have made outstanding or fundamental contributions to their fields.