Qenya name for Ælfwine from the earliest Lost Tales (LT2/313). Most likely it also means “Elf-friend” since its initial element is clearly Elda “Elf”, but the etymology of the second element is unclear.
Noldorin
elethon
masculine name. Ælfwine
A rejected Noldorin name for Ælfwine (“Elf-friend”) appearing in The Etymologies from the 1930s (EtyAC/SON), a combination of Eledh “Elf” and the suffixal form of (rejected) thond “friend”.