A name given to Finrod for his friendship with the Edain (MR/306). It is a compound of Atan “Man” and the suffix -(n)dil “friend”.
Quenya
Atan
the second folk
atandil
masculine name. Friend of Men
firindil
masculine name. Friend of Men
lér
man
**lér noun "man" (NI1; hypothetical Q form of PQ dēr; the form actually used in Quenya was nér)
nér
man
nér (1) (ner-, as in pl. neri) noun "man" (adult male elf, mortal, or of other speaking race) (MR:213, VT49:17, DER, NDER, NI1, VT45:9; see also WJ:393)
nér
noun. man
vëo
man
†vëo noun "man" (WEG; etymologically connected to vëa "manly, vigorous"; the more neutral word for "man" is nér. According to VT46:21, Tolkien indicated that vëo is an archaic or poetic word.) Tolkien at a later point defined the word as "living creature" (PE17:189). Cf. variant wëo, q.v.
Atan pl. Atani noun "the Second Folk", an Elvish name of Mortal Men, the Second-born of Ilúvatar. Cf. also Núnatani (WJ:386), Hróatani (PE17:18), q.v. Atanalcar masc. name, "Man-glory" (UT:210, cf. alcar). Atanamir masc.name, "Edain-jewel"? (Appendix A). Atanatar masc. name, "Father of Men" (Appendix A), also common noun atanatar, pl. Atanatári, "Fathers of Men", a title that "properly belonged only to the leaders and chieftains of the peoples at the time of their entry into Beleriand" (PM:324, SA:atar)