This word first appeared as ᴱQ. ar (arn-) “child” in the Qenya Lexicon of the 1910s (QL/32) and its stem form arn- appeared in the Poetic and Mythological Words of Eldarissa (PME/32). The word reappeared in Early Qenya Word-lists of the 1920s (PE16/135), but in the Early Noldorin Dictionary the Qenya form was given as arne. In the Declension of Nouns from the early 1930s, the word appeared as ᴹQ. aran (arn-) “child” (PE21/19), but there is no sign of it from this point forward, probably displaced by Q. aran “king”.
Qenya
eru
noun. The One God
erume
noun. desert
eruman
place name. desert N.E. of Valinor
ilu
noun. universe, world
amil
noun. mother
aran
noun. child
ette
adverb/adjective. outside
inga
adjective. first
amme
noun. mother
anna
noun. gift
enna
adjective. first
esta
adjective. first
ilduma
noun. heaven
min
cardinal. one
mine
cardinal. one
minya
ordinal. first
seldo
noun. child, child [m.], *boy
A word for a (male) child in The Etymologies of the 1930s added to its entry when the meaning of the root ᴹ√SEL-D was changed from “daughter” to “child” (Ety/SEL-D). It was written above its feminine equivalent ᴹQ. selde and an apparently neuter form ᴹQ. selda was written to the right, making seldo likely the masculine form as suggested by Carl Hostetter and Patrick Wynne (EtyAC/SEL-D), hence = “✱boy”.
A noun in The Etymologies of the 1930s glossed “desert” derived of the root ᴹ√ERE “be alone, deprived” and connected to the name ᴹQ. Eruman which was described in this document as a “desert N.E. of Valinor” (Ety/ERE).