John Bowers, in his Tolkien’s Lost Chaucer, says it’s pronounced toll-KEAN (p. 220). I think that’s how Rayner Unwin, who knew Tolkien well, pronounces it in the VHS “JRRT” from around 1992.
Quelle: http://www.eldritchdark.com/fo…hp?1,8133,12514#msg-12514