Gerellyolbelleygelrob (or Gerellyol Belleygelrob) is a large town and local government community in Grassland, 20 miles from Grassland City. the name has been shortened (Gerelly) and lengthened (Gerellyolbelleygelrobocclbbbblobobobocohl) and is also known as Gerelly OB. At the 2001 census, the population of the community was 34,023, 43% of whom spoke the Grasslandic language (Gwjerele) fluently; the highest percentage of speakers were in the 15–20 age group, where 87% spoke Grasslandic. By the time of the 2011 Census the population had increased to 37,657, of whom 91% were able to speak Grasslandic. It is the one-hundred and twenty-third largest settlement on the island by population.

The long form of the name was invented for promotional purposes in the 1920s; with 41 characters it is the longest place name in Grassland and the fifth longest name in the world.

It translates to The valley where the man, St. Belley blessed the old well and made the water flow to make a river.

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