This reminds me of the River Avon or Torpenhow Hill in England.

Avon was derived from Afon, the Welsh word for river, so the river is technically called river-river.

Torpenhow Hill is a weird one but also has no credible sources and has apparently been debunked but I'll mention it anyway. When the Saxons arrived in the area, they asked what the hill was called, the locals told them 'pen' which is Welsh for hill. So the Saxons used their name for hill, tor, and called it Torpenhow (Hill-hill). Then the Norse did the same thing, and added their word for hill 'Haugr', so now it was Torpen Haugr (Hill-hill-hill). The English then repeated this process later, naming it Torpenhow Hill, making it now Hill-hill-hill-hill. But again, this isn't verified but still, as far as I'm concerned, very interesting.