Þorsteinn Thorarensen is an Icelandic translator who translated The Hobbit and The Lord of the Rings, as "Hobbitinn eða út og heim aftur" (1997) and "Hringadróttinssaga" (1993-1995) respectively. A curious fact in his translations is that he translated all names into Icelandic. All of them.
In Vinyar Tengwar 42, Arden R. Smith gives an impressive list of many names that can be found in Thorarensen's translation. These include the Norse names ("Gandalfur", "Þorinn Eikinskjaldi") and the Old English ("Hjálmur", "Jómar", "Þjóðan"), but also the Elvish names. One finds such names as "Bréglaður", "Dyrþanki", "Hýrlúnn" and "Hallbarður". Appendices E and F are not translated, so it is unknown what Thorarensen would have made of that.