Term for the second tribe of Elves as companions of ✶Tata, the first Elf of that tribe to awake, a combination of his name and Q. lië “people”.
Quenya
tata
noun. *daddy
tatalië
proper name. *Company of Tata
atta
cardinal. two
This is the usual Quenya counting number for “two”, derived from √ATATA (VT42/27; VT48/19), which in turn is based on √AT “bi-, double, again (a second time)” (PE17/148, 166). It may be contrasted with yúyo “both” referring to both elements of a pair.
Conceptual Development: There was no word for “two” in the Qenya Lexicon of the 1910s. In the Early Qenya Grammar (EQG) of the 1920s, ᴱQ. yúyo meant “two” and ᴱQ. {satta >>} satto meant “both” (PE14/49, 82). By The Etymologies of the 1930s, these meanings were reversed with ᴹQ. atta “two” appearing under ᴹ√ATTA and ᴹQ. yúyo “both” appearing under ᴹ√YŪ (Ety/ATTA, YŪ).
atta
cardinal. two
atta (1) cardinal "two" (AT(AT), Letters:427, VT42:26, 27, VT48:6, 19). Elen atta "two stars" (VT49:44); notice how a noun is indeclinable before this numeral, and any case endings are "singular" and added to the numeral rather than the noun, e.g. genitive elen atto "of two stars" (VT49:45). Attalyar "Bipeds" (sg. *Attalya) = Petty-dwarves (from Sindarin Tad-dail) (WJ:389). A word atta_ "again" was struck out; see the entry _TAT in Etym and cf. ata in this list.
atyo
noun. *daddy
satto
cardinal. two
satto, "Qenya" numeral "two" (in Tolkiens later Quenya atta) (VT49:54)
An affectionate address from 4-year old Ancalimë to her father Aldarion, in the 1st sg. possessive form tatanya (UT/191). It appears nowhere else, and I recommend using the better attested Q. atya for “my father (affectionate)”.