A word for “brother” in the Gnomish Lexicon of the 1910s, a masculinized form of G. heth “brother or sister, ✱sibling”, along with several (archaic?) variant forms {hethweg >>} hethwig, hestron, and hethron (GL/48-49). It was ultimately derived from the early root ᴱ√HESE [HEÞE?] (QL/40).
Gnomish
hest
noun. brother or sister, *sibling; †consanguinity
hethos
noun. brother
hothron
noun. captain
A word appearing as G. hest in the Gnomish Lexicon of the 1910s for “brother or sister” [sibling], but “properly consanguinity, the relationship of brother and sister, or brother and brother, etc.” (GL/48); this original meaning seems to be archaic, transferred to G. hestri or G. gochestri. This word is derived from the early root ᴱ√heth (GL/48).
Neo-Sindarin: For purposes of Neo-Sindarin, I would retain the word ᴺS. hest as a derivative of the Neo-Root ᴺ√KHETH to serve as a gender-neutral term for “sibling”.