Qenya
ti
pronoun. *that by you
ti
pronoun. they
toi
pronoun. they
tí
pronoun. them
he
pronoun. they
se
pronoun. they
sen
pronoun. them
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
A demonstrative appearing in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 associated with the familiar 2nd person ᴹQ. ke “you” (PE23/96, 98-99), hence used to refer to the place of the person being addressed = “✱that by you”.
Neo-Quenya: In earlier pronominal charts from this period, ᴹQ. ti was initially used for 3rd person pl. “they”, but in later writings this became te. Meanwhile, the familiar “you” later became tye derived from ✶ki. Thus I think ti remains plausible as an (obscure) second person demonstrative “that by you”, but I would use it sparingly compared to the more ordinary ta “that”.
Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. ena “that by you” derived from the early root ᴱ√E of similar meaning (QL/34).