Qenya
hildi
collective name. Mortal Men, (lit.) Followers
hilde
noun. heir
aryon
noun. heir
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
Two similar words appeared in The Etymologies of the 1930s: ᴹQ. aryon “heir” as a derivative of the root ᴹ√GAR, and ᴹQ. haryon “(heir) prince” as a derivative of the root ᴹ√ƷAR, both roots having to do with possession (Ety/GAR; Ety/ƷAR). Drafts of these entries had aryo, aryon “son of property = heir” and aryon “heir, prince” (EtyAC/GAR; EtyAC/ƷAR). Based on the gloss “son of property”, I think it is likely the second element of these words is the root ᴹ√YO(N) “son”.
Neo-Quenya: It is possible Tolkien intended haryon and aryon to coexist, but since we have other “prince” words I would just use aryon “heir = one who inherits wealth” for purposes of Neo-Quenya.