 In the Terschelling dialect, "Oerol" means "everywhere" or literally "overall" in the sense of covering the entire land ("oeral" in standard Frisian).Oerol takes its name from an old Terschelling tradition, when for a short time in early spring cattle were allowed to roam freely on the island, grazing on any and all available greenery.The "oerol" tradition continued until the arrival of paved roads, since cars and bicyclists collided at night with sleeping cattle; it was finally ended during the German occupation of the island in World War II.