A name or title of Christ as the redeemer of the world, used in Tolkien’s Quenya translation of the Litany of Loreto prayer (VT44/12).

Possible Etymology: The first element is the genitive form mardo (“of the World”) of the noun mar(da), elsewhere translated as “dwelling” (PE17/107). This word (and its relative már) did not usually mean “World” in Tolkien’s later writings, but the earlier form ᴹQ. mar (mard-) was sometimes glossed “Earth” in his writing from the 1930s (LR/72, Ety/MBAR in Martano “Earthbuilder” and Endamar “Middle-earth”). Alternately, this may have been a restoration of the much earlier ᴱQ. marda “world”. In later writings, the usual Quenya word for “World” was Ambar.

The second element of this name is runando, apparently meaning “redeemer”.