Réttarfoss

This one is confusing; the National Land Survey of Iceland lists three waterfalls called "Rettarfoss" on the same river within a stretch of about 5km of one another, one of which also appears to share the names Leyningsfoss and Rollufoss. Whether these three names are properly associate with three different waterfalls, or whether there even are three different waterfalls, is unclear. We've opted to omit the duplicate entries and list the two other names as alternate names for this entry until further clarification can be found.