Ulysses Tholus (Mars)

This feature is named after an earlier feature.

Ulysses Tholus is a Martian volcano. Ulysses Tholus is immediately east and slightly north of another volcano, Biblis Tholus. The name of the mountain itself was changed on September 19, 2007. (wikipedia entry)

A tholus is a small domical mountain or hill. On Mars they are named after the nearest named albedo feature on the Schiaparelli or Antoniadi maps.