29 named features carry the IAU descriptor Tholus — a small domical mountain or hill on Mars, out of 109 in the mapped Solar System.
The IAU assigns each feature class on each world a naming theme. Across the 29 tholi with a recorded origin, 4 categories appear, led by Greek.
Every one has its own page, on the surface it sits on.
The same descriptor is used on 4 other worlds, for 80 more features.