6 named features carry the IAU descriptor Unda — a dune field on Titan, out of 14 in the mapped Solar System.
The IAU assigns each feature class on each world a naming theme. Across the 6 undae with a recorded origin, 2 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 8 more features.