A noun for “redeemer” appearing in Tolkien’s Quenya translation of the Litany of Loreto within the longer name Mardorunando “Redeemer of the World” (VT44/12). It is clearly based on the verb rúna- “to free” as suggested by Wynne, Smith and Hostetter (VT44/17).
Quenya
runando
redeemer
runando
noun. *redeemer
-ando
redeemer
-ando masculine agentive suffix, deleted in the Etymologies (VT45:16), but occurring in words Tolkien used later, like #runando "redeemer".
#runando noun "redeemer", isolated from Mardorunando masc. name "Redeemer of the world" (VT44:17)