22 named features carry the IAU descriptor Collis — a small hill or knob on Mars, out of 44 in the mapped Solar System.
The IAU assigns each feature class on each world a naming theme. Across the 22 colles 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 2 other worlds, for 22 more features.