1834 F. D. Hemans Songs of Captivity iv, in 168 I dream of some proud bird, A bright-eyed mountain king.
1954 J. R. R. Tolkien ii. x. 416 Like a lost child that had clambered upon the throne of mountain-kings.
2000 (Electronic ed.) 1 Nov. 167 Among the Lapps, it was said that the northern lights originated in a battle between the god Thor and the mountain king.