A lot of Tolkien names come from old Germanic languages. Eärendil for example from Ēarendel, the Old English name for a figure from Norse mythology [1]

Or maybe from the 9th century poem Christ I [2], which translated to modern English starts off with the words

    Hail Earendel, brightest of angels,
    Sent to men over middle-earth,
    And true radiance of the sun,
    Fine beyond stars, you always illuminate,
    From your self, every season!

IKEA catalogs using Swedish names, and Swedish being a Germanic language that stayed truer to its Germanic roots than English did, it's not that far off. In a weird way

1: https://en.wikipedia.org/wiki/Aurvandill

2: https://en.wikipedia.org/wiki/Christ_I