A word for “sister” in the Qenya Lexicon of the 1910s with numerous variants: heresse, hesta(noi)ni, and hestaqin, all based on the early root ᴱ√HESE that was the basis for “brother” and “sister” words (QL/40). Of these Tolkien said heresse was the “ordinary word”, and it also appeared in the Poetic and Mythological Words of Eldarissa (PME/40).
Early Quenya
noldorin
masculine name. Noldorin
noldorin
adjective. Gnomish
noldorinwa
adjective. Goblin; Gnomish
hestani
noun. sister
hestaqin
noun. sister
heresse
noun. sister
hestanoini
noun. sister
A name of the Valar Lirillo in the earliest Lost Tales (LT1/22). It is probably derived from his association with the Noldoli.