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.

Gnomish

gwanos

noun. family, birth, heredity

A noun appearing as G. gwanos “family, birth, heredity” in the Gnomish Lexicon of the 1910s, a combination of G. gwa- “together” and G. nôs “birth” (GL/44), hence probably originally something like “✱totality of births”.

Neo-Sindarin: I think ᴺS. gwanos can be retained in Neo-Sindarin as a combination of S. go- “together” and S. nos(s) “kindred”, especially in reference to one’s lineage.

Gnomish [GG/08; GL/44; GL/61] Group: Eldamo. Published by

eithlos

noun. family

A noun in the Gnomish Lexicon Slips of the 1910s glossed “family, etc.” of unclear derivation, though it may be related to G. eithog “ancestor, †father, sire” (PE13/113).

gwaren

noun. family

gwarin(n)

noun. family

The word G. {gwaren >>} gwarin(n) “family” appeared in the Gnomish Lexicon of the 1910s, derived from primitive ᴱ✶ŋuarenđā (GL/44). It was a combination of G. gwa- “together” and G. renni “family” (GL/65), but it is not clear why the e became i in the compound.

Neo-Sindarin: For purposes of Neo-Sindarin I would adapt this word as ᴺS. gwaren as a combination of later prefix gwa- “together” and the Neo-Root ᴺ√RE(N)D “kin”. Furthermore, I would use it specifically for a nuclear family (just the parents and children), as opposed to S. nos(s) which seems to refer to an extended family or clan.

Gnomish [GL/44; GL/65] Group: Eldamo. Published by

renni

noun. family

A noun in the Gnomish Lexicon of the 1910s glossed “a family”, derived from the early root ᴱ√redh- having to do with kin (GL/65).


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.